Originally Posted by Chad Millikan

A while back on this thread, I read that the RB ones work for the back plate.

Originally Posted by Jaz240

I have 40 different screwdrivers Tony and I even went as far as finding the perfect fit and then grinding down the edges so the driver fits into the holes in the cooling head. The design of the screws are just so bad that the driver slips loose before I can apply any torque. The P5 has a large O-ring type squish band under the head button that gets torn up fast and needs to be replaced and my engine needs a new front bearing. FYI the Werks head screws fit perfect and they are 3mm cap head hex so they will be very difficult to strip out if anyone is interested.