Fine tune a bow in 30 minutes? Thats a little fast. I wish i was that speedy. For me to have a bow perfectly tuned it takes me about 15 hours. That of course is shooting every tuned set up possible. Tiller, Points, and arrow length. I set the bow up for 125 then 100 then 85, normally although all are tuned right one will shot better then the rest(this is after shaft length). I also try 1/16 tiller adjustments, once again one usually shots better then the rest. I buy 12 of the arrows i plan to shot, keep 2 bare shafts 2 fletched. Then i shot them initially 1.5inches past the riser. I start cutting off length(1/4 Inch at a time) and retuning the bow, Usually the groups get smaller then larger. I keep tabs on group size. Then i give those arrows away and cut the other shafts to the best length. I know I know your throwing away good shafts by cutting them short, But i have a better tuned bow then most because of this.