Has anybody on here ever heard of exPBA pro Arnie Goldman? He actually came up with the idea of interchangable grips and thumb slugs back in like 1990 or something and patented it and everything. Word has it he tried to sell his invention to Turbo, who's headquarters by the way was like within a 5mile radius from his house, and Vise and was turned away by both of them. Then not too long after that they both came out with their own switch grips. He's been tied up in court with them for years over them stealing his idea. Come on Turbo and Vise, give the man his due, do you need ALL the money? Yo u can see Arnie's device at Perfectagrip.com. There's some links on there that explain the whole deal