Will a Gen 1 Glock 17 slide fit and function properly on a Gen 3 frame from a G17L? (As far as I know the 17, 17L and 34 all use the exact same frame. Is this correct?) Conversely, will a Gen 3 G17L slide work on a Gen 1 frame? I have a G17L that I'm trying to convert to a 17 or 34 to shoot production in USPSA and also shoot IDPA. A fellow member has a Gen 1 G17 slide to trade. Just wondering if his slide will work on my frame and if my slide will work on his frame.