i just got a powertec a month or so ago and love it . thats about all my bowshop did to . i had to ask the to check the speed . at 69# 28" draw 355gr. arrow was 284 so i'd say your shooting a little faster than you think . [/align][/align]heres a link find (tuning guide) and it will help alot [/align]http://www.eastonarchery.com/downloads.asp[/align]