Apparently you haven't read my other posts. Did I not say would you rather carry a 346 into the woods or 372. The 40% is measured with a 16" bar and times are taken before and after the port work on the same exact cant with same bar and chain. There is point where the torque factor of a larger cc motor will take over I agree but in smaller wood say up to 20" the bigger saws won't cut any faster. Did you not look at the vid in my other post with link to a ported 346. I would say my 346 would hang right with a stock 372 if both had 20" bars. A 28" bar is a bit much for a 372 and will not pull it with authority in hardwood. I don't even run a 28" on my Solo681. No koolaid here. Basically you have to run a Dan Henry Power Ported saw to appreciate how good they run. I checked with my source on this and he said the 40% should a minimum gain. He has heard of over 50% gains in the 50cc 346NE.