I do that but thank God I've never needed it.
and I agree with everything you said about the helmet. For me, I could try them on at the doo dealer in town. I had no idea where to go for the mission. the Mission definitely looks cool though.
Dennis Kirk lets to try on helmets and send them back at N.C. if swapping for another one. Or if you are like me at the top of the size chart then they do a full refund.
If I had to describe the fit of the Mission, I would say it is more round head shape but not quite fully round but not tight to you nose and mouth. Ski-Doo helmets have alway felt more oval shape but tighter on the front of the face, like a motocross helmet with the front being narrow but also pushed close to you nose and mouth. (They have never felt comfortable to me. Always want them but never worked out.)
My CAT TXI felt perfect maybe even a little big, but had lots of issues.
My Castle X EXO-950 was tight but fit good enough to use for 5 years.
The Mission feels the best out of all of them! Until having the Mission I alway want to go back to my TXI and deal with the problems because the fit was more comfortable... If it would have been modular, I probably would have gone back.
At some point I tried the FXR X1, it was ok. felt to narrow in the front by the jaw.
All were 3XL but in the Mission I put cheek pads that are 4XL inside. No complaints and like the way it opens even better than the normal modular style.