G6
Well, think about your first question. If you corner the deck before you trim all the sides, you're probably going to cut the rounded corners off unless you use a huge rounder first that rounds past where the part you're going to trim is.
For the second question, I have both a 5mm and 9mm rounder that I bought off Overstock. I don't think I've ever used the 9mm rounder though.
Rodney
Thanks, do you have the kind that looks like a staple remover or the one with a long handle?