My sons run the dog snot out of the Simonized MS460, it is tuned to run a at 15,600 rpm, it is set up with a 25" bar most of the time, occasionally a 32". They have cull logs delivered to their firewood site, so no limbing is involved. The majority of the wood runs 18"-24" in dia and is all oak or hickory. The saw runs on 91 oct no ethanol and Ultra at 40:1. The saw is run in wood most of the time at wot, with the bar buried at 80% -90% of it's length most of the time. Looking at the piston and cylinder thru the exhaust port and spark plug hole I have no reason to believe there is any premature wear on the cylinder. It has done this over a year and a half. I see no reason to shy away from a properly modded saw, for us it has increased their production, taking less time to block up their wood and allowing for more time to split and load. The 460 came back 43% faster than stock, it prolly translates in them being at least 30% faster in production. It offsets the increases fuel consumption imho.
Although it doesn't translate to the majority of members on this site, when you work on saws everyday you realize most don't give a rat's azz about the quality of fuel or have a clue of what ratio they are running. We empty the gas out of every saw before working on it, always testing it for ethanol content, not for warranty issues but to educate the customer. Most people run their mix extremely thin, and the ethanol has absorbed a ton of water, just pathetic, some looks more like goat pizz than chainsaw mix. It is amazing what a saw will run on and the abuse they will take. Had a FS 70 trimmer this summer, the guy had run his six pack of Ultra thru the trimmer and then his son straight gassed it, came in cuzzing and saying way a piece of **** it was, it kept locking up after a few minutes of running, had locked it up at least three times, broke the piston loose, no real scoring, filled it up with 40:1 and it's been running every since.