I played a couple of games on both units that were at CAX. It reminded me a lot of all the debugging I've had to do on all the 3D printers I've owned over the years (not surprising, as they're both basically Cartesian bots at their cores).
True, it was the end of the night by the time I got to them, but there had definitely been some belt slippage, and the detection was off in one corner (the "ball" would clearly miss the paddle and still bounce back), and it took a LOOONGGGG time for the paddles to reverse direction.
I sure hope this all gets worked out before these go into wide distribution.
Best of luck to you, and also to all the investors!