Ok, here's the deal. My center put Twisters in about 3 months ago. At first they were nearly impossible - I've seen 10 pins slide into the 7 pin spot. To solve the "problem" of pins sliding and not falling they put small pads of some sort, under each pin. Now they fall pretty normally (except the cursed 9 pin, of which I leave about 12 every 3 games). I'm wondering about that pad. Is it legal? I suppose it must be, or they wouldn't be sanctioned, but it seems odd to me. (WARNING - APPROACHING FIGJAM) BTW, I am averaging 222 on these pins, even with all the 9 pins I'm shooting, so I guess I can't complain too much.