In my opinion, all reamers (machine and hand) should be sharpered between centres.
I can see merit in that, certainly wouldn't hurt as there is going to be some run out with a collet.
Originally Posted by oldtiffie
on drills, I made a little hardened V block with micrometer tooth rest that goes on a univise (that i made). do one side then indexing 180 (using the tooth rest) for the other, kind of fool proof. If you haven't seen it yet, here are some pics. I can sharpen by hand and do for roughers but mostly I now use this as it as nice having drill bits cut pretty much spot on