Me and a buddy went shooting at bill's north on tuesday.  We were literally the ONLY shooters there most of the day, and although we shared a lane, we were able to branch out a litle into the unused ones.
 The AK brass catchers worked great!  60 round capacity and NONE spilled on the floor. I would recommend these for anybody. remember to charge the weapon BEFORE installing the catcher!  
 I shot my Ak so much that the fore end burned my finger.

That remind me of my first range session with my first AK:

"A happy AK is a smoking AK".