Cossie runs the same IIRC.
You can get a piston type BOV that bolts onto the turbo, better than the diaphram ones
I think Collins made them.
Can someone please tell me what is the oil feed screw thread size on a tomcat?
This is the screw between the central housing and the oil feed line.
I've read that on most T2-T25 it is M11x1.0 but it is definitely not. Maybe M11x1.25 if it is metric at all?