Have the WUR apart and rebuild kit on hand.

I see some discussion about drilling a hole on the bottom cap (pictured below the rusty cap in the recessed area) to allow adjustment to the diaphragm 4mm hex head screw to adjust warm CP.

I have seen discussion here about modifying the CCP screw on the top of the WUR but never seen talk about adjusting warm CP.

Is this not applicable for the 928 WUR?

 

I found a recent thread and post 4 speaks to this modification and warm CP adjustment.

https://rennlist.com/forums/928-foru...djustment.html