Yes, pkx, as you see above (it seems we wrote at the same time ) I finally got it and I will do some refactoring as I can now greatly simplify it. I see a lot light at the end of the tunnel.
Regard the price point: I was able to get some Sumos for “my” kids really cheap. I only have to repair the jumping mechanism (luckily I know how to do that), which is the only part that unfortunately has been engineered to be too weak.
cheers and thanks again for all your support - I really do appreciate it!