so what the cause of boost spiking? been trying to get the car to hold 18-19psi, in first and second its not a problem get to third and it creaps up from a 4500rpm onwards from 19psi round to 21-22, not good really as i dnt intend on running the boost that high. read somwhere that i could drill out the wastgate hole so that its slightly bigger so letting out more gasses, would this help?