**No, not the torx screw. That controls fuelling at pre-boost revs.
You probably need to tweak that and the main
**Yeah, I think we're thinking on similar lines. I have tested it firther today and discovered that I've turned up the torx screw a little too much - I get some smoke at 1200 ish revs in a high gear under heavy load so that needs backing off a bit. Performance is better though.Once I've got that balance right I'll try upping the boost response ones - the needle and the star wheel under the diaphragm cap.
TonyB