i do have fans in my helmet and to be honest i dont really think they do much,if its hot outside they just pull hot air in!
i cut my cod but wont be doing it with my next though,i have an undersuit that zips up at the back an has a small zipper at the cod to make bathroom
breaks easier.as was said minimul helmet padding with a strap,the more room you have in your helmet is the key,im afraid i do use nomex gloves most of the time!