No way I can think of for anyone to truly answer that question without seeing you shoot. I haven' t seen your form, so I don' t know whether you need correction or not. But if you didn' t creep before with 30" and you' re creeping now at 29" , it gives me a level of doubt. You may be better off at 30" .

What form flaws was the proshop guy trying to cure by shortening your draw?