looking at helmet offers, as after 6-7 years of sweating in them you should get a new one. which models and colors are sexo? as I have a big heda, I can profit from the cheaper L sized helmets on sale. and MIPS is a Swedish scam I guess.
don't know about the abused gamechanger that grug wears, I think aerohelmets are overkill and I'd rather prefer more vents, but it's easier to find on sale than the airbuckbreaker.