Wayne wrote:

I have 3/8" shank holders with HSS inserts. I have 1/32 and 1/64
radius inserts.

You might want to consider positive/negative rake carbide inserts. See
my article at
http://www.metalwebnews.com/howto/toolholder/toolholder.html

Also, see my reply elswhere in this thread re deflection.

Ted