I'm using VTC5's with this mod and defintely not pushing the limits, however it seems (to me as a total newbie) that this clone is lacking in the vent hole department. Its been fine the way it is, but I was thinking how easy it would be to have a B&M drill a couple of holes in it (just for safety sake). I have concerns that debris could find it's way inside the mod and caused problems, and am confident that the manufacturer knows what it's doing, so my question is
is this a good idea to have done or not. And if so , what size hole would be adequate?