ive upgraded my sapph to stage 3,it has a t34 with a .48 housing,i have adjusted the actuator so it just slips over the wastegate arm.it is boosting at 21psi.i was told when i unsuccsessfully had it set up that it should be 15psi for a stage 3 set up.if i adjust it anymore the wastegate will be permanentely open.i have a collins actuator which is brand new,could the spring be too strong?