I've heard of die filers that mounted in a lathe, but have never seen one. Thanks for posting a photo of yours!

I also like the spill-proof oil container you have on your cross slide. Is it fastened in place there, or does it just happen to be sitting there in your photo? I assume that is what it is anyway, it looks like some sort of container with an acid brush sticking out of it.

I had this incomplete die filer laying around for decades. So, I took some time over the weekend to get it up and working again. With some scrap metal I fabricated a drive shaft with an oscillating drive head. I made the drive shaft longer than necessary. Since I was using a lathe as my power source, I had concerns about the spinning chuck being too close to the die filer working area and a hazard to me. And all this maybe being a good idea but possibly causing some kinda weird vibration at the oscillating drive when under load. But, after a test run, all was good.  So, now I need something to file on, lol. There is no name on the die filer other than "Pat Pending". It had a #2 Morse taper for mounting. I changed it to a #3 Morse taper to fit my lathe. The white felt thing (umbrella) under the die filer table was my idea for keeping the filing swarf out of the moving parts. I guess time will tell.
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As nice as a Cuttermaster appears, one of those probably will not happen for me. Used ones seem to be in the $2000 range or more and a new one is $11000. Sadly, I don't have the cash available to pursue such a machine.

I know, I know, you get what you pay for. I would love to buy once and cry once, but my budget dictates that something like a Quorn or Stent will be what ends up in my shop. The Quorn and Bunelle have the advantage of being able to sharpen taps and reamers, but I doubt I will be doing any of them. 

Shars offers a U3 style machine at a reasonable price, but I know where it is manufactured, and find myself a bit skeptical. The reviews on it are quite good, but I am still suspicious.

I also need to keep the footprint small as I don't have a huge shop by any means. Something that is small enough and light enough to be able to place it on a storage shelf will be important for me. On the other hand, it may see enough use that it will remain permanently on a bench top.

Decisions, decisions.  Tsk, tsk.

That family of grinder that you are looking at, to me, does not meet your objective. I have a similar design and it does an excellent job of dealing with pantograph cutters, but that's it! I also have a Cuttermaster, and that would be my recommendation. It's kinda like a floor model tool grinder but in a smaller envelope. Way more capabilities than a Quorn in IMHO. My three cents. My Cuttermaster is made in China (I think all versions are?) but it's been a great addition to my Hobby Shop! It can make a mess! Find a place that can handle the grinding swarf! A vac system and well placed rags when using the Cuttermaster would be a good idea. If you find one with a pneumatic spindle. Make sure the spindle works (turns freely) with air. If it does not, it's probably rusted inside and now just a hunk of metal, ask me how I know!

Thanks Ken. I am a member of that group also and have looked at those files too. 

Harold Hall from England did a series of sharpening jigs for a lowly bench grinder with upgraded wheels that may be easier to build than a T&C grinder and may also be easier to use. The series ran in Model Engineer years ago and portions of it showed up in a couple of different books that he wrote. He also wrote a book just on T&C sharpening. For $13 a copy of that book is on its way to me right now.

Right now I do not know for sure what direction I will take, but I am keeping an open mind. End mills are expensive, so having the ability to sharpen them would be great but is it worth it for me to spend $1500 or more to be able to sharpen them? Probably not. Some of Harold Hall's solutions will sharpen the ends of an end mill, but not the sides. 

For right now I am just in the planning stages anyway, but advice from others is always welcome, especially in an area where I have almost zero experience. I did have the opportunity to use a Darex end mill sharpener about 25 years ago. It worked okay, but not great. On the other hand, maybe I wasn't using it quite right either.

Here's the T & C grinder files:
https://groups.io/g/homemachineshop/files/better%20tool%20and%20cutter%20grinder/Building%20the%20Best%20Tool%20&%20Cutter%20Grinder.pdf

Here's Marks Group on IO.
https://groups.io/g/homemachineshop/files?p=name%2C%2C%2C20%2C1%2C0%2C0&jump=1

Terry, I doo not have any experience with any of these.  I do remember the Quorn T & C that Mark did. I have the drawings for it somewhere in my stuff. I recall Mark setting up a place over on IO for the projects he did.  If I can find it, I'll post a link here.
If you need any cast iron, I still have a good collection of it here to offer to anyone that may need a piece or two.  My source of getting it dried up and can no longer get any at hobby level buying.   

I am considering the construction of a tool and cutter grinder and I have looked at several. I first considered purchasing one of the Chinese grinders available various places on the web, but after chatting with one person who had purchased one, I decided to take a different path. He indicated that the one he purchased was much like any machine made in China, it requires work and modifications to actually turn it into a quality grinder. These machines are more like glorified kits than complete machines. Additionally, their functionality is limited as the accessories to be able to sharpen end mills or reamers are either an extra purchase or non-existent. 

Back in September I attended the Black Hills Model Engineering Show in Rapid City. Gary Martin of Martin Model and Pattern was there and he carries castings for the Quorn Mk I and Mk II. He also carries castings for a less expensive but easier to build (and less capable) grinder called the Tinker. I felt that the Quorn was a little outside of my budget, but I did purchase the instructions for the Tinker. Those plans also include instructions for building the Tinker entirely from bar stock if desired.

Another option is the Quorn Mk III. Castings, drawings, and construction notes are available from AJ Reeves in England, now known as Hemingway Kits, a seller of kits for machines and model engines. Their kit also includes all bar stock for the complete build. The Mk III has a number of advantages over the Mk i and II, and in the end the cost for each version is about the same. The Mk III also uses ER collets if I remember correctly.

The last option that I have been considering is the Bonelle Tool and Cutter Grinder which is similar to the Quorn but is built entirely from bar stock. Plans are freely available and I have a copy of them which I will be adding to our plan files section. An advantage to this grinder is that Mark Frazier built one a little over ten years ago, back during our H-M days. He did do a build thread on it, that much I have verified, but I have not yet read through it. I still have a certain lack of desire to go over there, but I might just do so at some point and read through all 54 pages of that thread.

This brings me to the grand question: Do any of you have any experience with the Quorn, Tinker, or Bonelle? If so, I would really like to hear about it.

Nice set of tools!  Engine and tranny guys are more machinist than they sometimes realize or think!