No experience whatsoever, but what about replacing the trigger guard with a larger loop, or drilling through the trigger guard, so when ready for a firing session, the accessible trigger piece can be attached in front, in addition to side? Other option, fixed mechanism one side of the trigger guard, so a hinged piece anchored to it, through the trigger guard in front of trigger, would be a lever from the opposite side Spitballing, and that'd need removed when not actively firing, because it'd make it too easy for an accidental discharge, I'm thinking.
