I tried the double thumb on a Complete NV and shot two 800s, with the second breaking the house record. I also shot a 300 and 297 in these 800s. I haven't tried it on Storm, cuz I'm not that into Storm anymore, but it is a really amazing layout. It has to be on a ball with a longer pin, say 3"-5" and make sure there isn't alot of top weight. I also tried it on a One Pearl, and it had too much top weight. 3 oz. All it did was ping tens.
Great layout. I'd recommend it.