You wouldn't have a picture of the holder you are using would you? I have
a
collet spinner and a finger to locate the flute not sure if that will work
ok.

My Monoset T&C grinder just has the spinner and finger like you have. It
works just fine. The pros will want the air bearing - very smooth and much
faster.

There's a GREAT section on how to resharpen endmills on the Hanita End Mill
web site. Sorry, I'm travelling and don't have the exact link on this
computer.

Karl