Me personally, i would let them do all the cutting. Especially if you are new to box building. Only thing though, i would make sure they measure more than once. Even if you do it yourself, measure more than once. The guy at Home depot who cut the wood, done a GREAT job. I measured 3 or 4 times and he was right on the money. But maybe I got lucky. And for cutting the holes, i would use a rotozip. Oh and be sure not to cut a perfect 12 inch circle (assuming you are making a box for 12in woofer) make it like 11 1/8 or somewhere around in there. *i say this because me being dumb ending up cutting a 12in circle without thinking.