No problem, on Mike's i think i did 3 separate holes (one for each motor wire) i think next time i'm just going to do 1 bigger hole and braid the motor wires. After drilling the holes i recommend taking a q-tip with extra thin CA glue and putting it on the edges of the hole to help keep the carbon from delaminating. A rubber grommet is also highly recommended to keep the carbon from rubbing through the motor wires. It will obviously weaken your boom a little but after seeing all the crashed kopters i've seen in the office, i'm starting to find that in the crashes where the booms break it helps keep the center plate from deforming at impact and might save your distribution ring from getting tweaked or bent. Much easier to replace a boom rather then possibly a center plate or distribution ring!