I found this thread as I was trying to design something to allow my wife to play pinball again, but have limited abilities and materials myself. She has no use of her left hand. Did any of the prototypes from Zaza, Yonki or Ben become a product I could purchase.

Well, I decided to bust out my Lego and make something. This has a nice easy action, a stroke about the length of a button press, and because it is mechanically linked, it has no delay in response (save for some tolerances to the Lego connections). I just need to get to a machine (we don't own any) to fine tune it, maybe a bit of design tweaking, and add some suction cups to hold it on the glass.