Stock didn't work for mine at all, and weirdly had to drop it to 40 to get it to cycle properly. Once set it's absolutely fine - had probs with a reloader tho others have said they're fine. I didn't fiddle with the speed of it so maybe thats what it was
I LOVE my ion - played my best tourney ever with it. Can't rate it highly enough.
Shooting too much damn paint! I took mine to the Flashppoint Scenario Game the other weekend and was shooting 1000+ a game (bear in mind I normally only shoot one or two pots a game!)