i picked up another 440 ,now have 4 including the hybrid ,one is all ms440 decomp jug ,the one i just got is 12mm 440 ,and i added a 10mm cylinder ,i just ordered an early flywheel for this saw to hopefully make it react in power like my 10mm one ,the other saw is early 10mm crank jug flywheel ,but i used 440 cases ,this saw all stock pulls a 32 inch bar burried in fir real nice without falling out of the powerband ,i just got the 12mm one going ,i want to do some testing to see if the same saws ,no porting perform any different ,i'm hoping to get the same performance in the one i just got going ,hoping the heavier crank doesn't hurt performance