MM's seem to be the first line in squeezing more performance out of a saw and maybe more importantly preserving some life by allowing heat to leave. What about the additional noise from modifying? Any best method to avoid that? What have you all found is the best balance of relieving heat and adding minimal extra decibels ? Louvered gills and better or worse than just enlarging the factory port? The Saw in this case is a ms241 I've added to my saws and, this one will be used in urban neighborhoods for work. My other saws are "mine" and are all ported, opened up and loud as hell. For the little 241, I'll abandon the idea of a MM and just run it if It gets too loud. Thanks for comments and suggestions.