Rick
This thread is about done until I get a couple of the M4 blades finished and they get some field testing by some thread members.
In grinding thousands of ProTech blades, I never had a reason to find any heat treat issues.
We ground all heat treated blades.
I do have a couple of the small Brend blades. They were set up pieces and had some minor blems to needing a hand ground repair.
If you want one that is good enough to install, I will send it to you. It may need a couple passes on a surface grinder, depending on knife construction.
I could also give you one that would need a little grinding to be used.
And no, I do not have any interest in tearing yours apart.
As far sharpening that size and style of blade.............
Using the Edge Pro I found that a shim under the blade was needed to keep the stones from riding on the plastic guard that the spine
rests against. I used a popcicle stick. Also a narrow hollow grind can be hard to hold in a consistent position.
A Lansky might not have that issue.
Let me know if you want to try a replacement blade.
We can start a new M4 thread later when something new to report.
Tim
