the whole LiHV thing is a non-issue. if you run at a track where everyone else is doing it and the racers have basically decided it's ok, then what's the harm? of course you can't do it at a big race. sure it's against ROAR rules, but so is charging over 1C and having a battery hotter than 5 degrees above ambient and just about everyone does that.

occasionally i'll walk around the pits and peep people's chargers to see what they're charging to. i've seen one guy charging to 4.35v but he's in the intermediate class so i don't care about him. i've never caught an expert guy charging over 4.22v (which is what i do as well. when pulled off the charger, the pack is 8.39-8.40v. confirmed this at a "big" race where they tech'd batteries).