Just tripled the size of the opening on my stock muffler can; and also added the dual port front cover to my ms460. I read several threads on here to try to prepare myself before doing this mod. Cut the tabs off the limiter caps. Put the high and low screws to a light seat, then backed off each one 1 1/8 turns counter-clockwise. Saw won't start. definitely seems like its flooding. I backed the low screw down to 1 turn, then to 3/4 turn. Backed the high to 1 turn. Its at least popping the decomp valve every few pulls, now; but still not starting. Thought I should check on here for advice before I go any further. I don't want to lean things out too far. Also, I did not touch the LA screw at all as I didn't see anything about that in the threads that I read. Should I be seating it and backing it off a certain number of turns? Thanks in advance for the help!