as long as they aren't "huge" they wont form a problem, i have a pvc box with 4 small diameter pipes next to eachother, each pipe secured with 4 screws in the exact same manner as you described, so 16 holes and i must say you don't even feel/notice them .....
-=|NS EURO MOD |=-
Belgium represent !
Once You drop in, it's all "Hakuna Matata" !
"The windows are vertical how am i going to poop on those?"-Killabees
"God isn't black, you fucking moron!"-Shibby
"I shit rainbows and sneeze glitter."-Arabian
"Giving a cat any amount of credit is just stupid."-ElGato