I shoot a PSE Firestorm, which is rated up to 60# (atleast the model i have does) I have kinda short arms and am shooting 27" draw length. The guy, well..kid actually, at the archery shop said because im only pulling 27" length that i cant get my bow to 60#?? Is this true? He said that the limbs would be cranked too tight and they could crack. I need som EXPERT opinions on this. Thanks guys.