I've posted info on this topic before, but here goes.
I have ZERO issues with any of this fuel blended with ethanol. This goes for every single piece of power equipment that I own, zero, nada......IF you follow a few simple procedures.
Never leave it in the saw or other power equipment for long periods of time without using that equipment. When the "season" is over make sure to dump the tanks and run the engine dry till it stalls out pulling the choke on it's last breath.
Next season I re-fuel and fire them up and to date I've never had a single issue with anything. This includes string trimmers, garden tiller, leaf blowers, chain saws, lawn mowers, and portable generators.
The one piece of equipment that I'd forget about was a grinder/mulcher that I hardly ever used. If I forgot to run the carb dry I'd end up taking the bowl off and dumping out the "apple jelly" and blowing out the main jet and carb. That only took about 2 minutes and it was fine afterwards.
Of course it's a little more time consuming if you have issues with an all position carburetor but even then 10-15 minutes and you are back in business.
I get chainsaws and other small power equipment in here daily because folks neglect it. I love ethanol, keeps the doors open and my wallet full. I also market some carburetor parts that are 100 percent ethanol compatible, but not for any of these applications due to the broad range of parts that would be needed. For automotive and marine applications I have a lot of those covered, including Quadrajets, AFB's, AVS's, 2GC, 4GC, Edelbrock Performer Series and a few others. It's hard to believe but accl pumps still being supplied in rebuild kits for many applications still have leather, buna rubber, neoprene or very poor quality fluorelostamer pump seals on them. Most woln't last an hour in this new fuel!.......Cliff