Actually, The model I have is a 690LRVS with variable speed (10,000 -
27,000 RPM) so the bit size should be OK with low RPM's. The manual
claims I can use a 3 1/2 in. bit with RPM's less than 13,000, though
I'm not inclined to use such a large bit.
So in the end, if I just bore out the existing sub-base all should be
good, unless I need to use a template, in which case, I'm in the market
for another sub-base?
I think I do need to spend the money on a couple of books, and spend
some time practicing with a few blocks of wood.
Thanks for the help