And as long as I'm wasting all this time on detail considerations, I'm
wondering if the two inch head will do me or if I might not be better off
with a 3 inch head for heavier jobs that might come up. APT has a 2-1/2

I bought a 2 inch criterion and I use it a fair amount and I really like
it. Its very smooth and pretty easy to hit the target diameter.
Based on that I decided that I HAD to have a 3 inch one. I don't think
I have ever used it.

Remember that 2 inch heads use 1/2 inch bars and that 3 inch heads use
3/4 inch bars. I think that fact alone prevents you from using a 3 inch
head for small holes because the 3/4 inch boring bar have big heads that
will not fit inside a small hole.

chuck