removal balls via a telescopic magnet thingy, or go to test mode and choose solenoid test and have the balls pop out or it may have an empty balls option or activate the ball ejector/kicker manually with your fingers
or just shake the machine vigoriously upside down until they fall out 
sorry I couldn't help myself
as far as anything else to do with the game, I think you should be ok moving, just secure the head and maybe remove the backgkass
I have to move mine this way occasionally. As above - castrate machine & firmly tie backbox to cabinet.
I knocked up a 2ft square dolly from 6 ply and 4 small castors (load rate 35 Kg each) this is almost essential to negotiate tight passageways & save your back(s)
PP
