Go to the menu and decrease the catapult strength and possibly increase the angle of your machine. It should not be that strong at the default setting.

YES

The four diagnostic buttons on the coin door. Please hold the "Escape" button down for 5 seconds or so.

NIB 2 balls stuck in Catapult
Issue:
I unboxed my MMR yesterday and initiated extensive play testing. I LOVE the machine but as its destined to be put out on location it needs to be just about perfect before going out. It needs coin mechs too which are on the way.....lets not go there.
When playing it after about 35 games I got two balls into the catapult and the kicker wasn't strong enough to get them out. I took the glass off and cleared them and two games later it happened again. This would be fatal for operation of the machine on location if I had to drop by 2-4 times a week to clear stuck balls.
The obvious solution is to up the power on the kicker and I did that and it cleared balls in only the +1 setting. The problem I'm having now is that at any setting other than default power (and sometimes on default) the ball hits the flasher dome behind the castle and usually drops backwards down the left ramp and occasionally ends up in the moat.
I thought I'd consult the pinside hive mind before bending habitrails or adding deflectors. I tried to bend the end of the catapult habitrail down to aim the ball downward into the ramp but that thing is STIFF.
Has anyone encountered this issue on MMR or on an original MM? Any suggestions before I start bending things?
Solution:
There's a lock nut most of the way up the habitrail that has about an inch of adjustment in it. Moved the habitrail to the right and it's 100% on the ramp.
The solution was just to move the wirerail for the catapult over to the right a little bit...just loosen the screw about 1/2 way up, slide the wirerail over a bit and tighten the screw.
It now works perfectly.