Bill
After looking at the IDPA rules, I agree that since the ambi mag release isn't specifically included, it is is by definition excluded (at least I read it that way). I called Smith and Alexander to exchange it for a new magwell and they said they used the ambi release in IDPA with no problem. Probably a case of don't ask, don't tell...
Regardless, I've decided that the 1911 is really a lefthanded gun in disguise, so I'll try to shoot it that way!
Keith