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My setup is a T4 with the SG200 and the 2 Japanese Sun Tiger Wheels 800 and 4000 grit.

I am successful in getting most my gouges, chisels and plane blades having sharp. I use the SVS 36 for all since is the only relevant jig I have.

However I came across 2 blades (both of them vintage blades bought in Germany) that I have failed (using the svs36). The burr was extremely hard to get rid of and when I did succeed to bring it to a really good cutting shape (not hair popping sharp as I like), after very few passes on a soft fur I see the edge getting damaged A LOT.
 
Any ideas? I would blame the steel but I am not that experienced and confident to do so.

Really kind of you to answer!
I m thinking, instead of getting a new SG-200, to get Sun Tiger 800grit and Sun Tiger 4000 grit. I think it would be helpful for my gouges and other woodcarving tools, plus the SG will then only serve as a grinding wheel... so I think it will last a bit more time!

Thank you for your reply Ken!

I realize and have already experienced the next sharpening and was as you say much faster and much easier.
After the regrinding of my old gouges the uneven wear was really obvious, I got a cheap diamond wheel dresser (t-bar style) and to be honest it did a good job (I realize not as perfect and controllable as the TT-50 would do, some day hopefully I get my hands on one).

One of Tormek's expert trainers told me that the learning sharpening causes more wear to the grinding wheel than subsequent sharpening. Not only are the tools generally sharper to begin with, the skills of the person doing the sharpening are more refined. Congratulations, you have put in the hard work. Youshould have smooth sailing ahead.

I do feel like that will be the case, just after the measuring of my wheel I got a bit anxious maybe something was going more wrong than I thought.

Hopefully you are right and I get a smooth sailing!

Hello!
Happy to make my first post here.
I have a T4 for about 7 months.
Mainly I use it for woodworking tools (axes, knives, drawknives, planes and gouges).
Since I had in my possession many old tools I used the T4 to regrind and re-profile many old neglected or damaged tools.
4 axes, 2 drawknives, 3 planes, ~25 gouges, ~10 mora knives plus some more light sharpening of knives during those months.
I realized that the diameter of my SG stone is now 175mm.
Does this wear seem more than expected?
I realize it is a general question but keeps bothering me... Maybe I am putting too much force and wear the wheel more than I should?