Howdy!
Well after our last convo I checked the amal valve again and it appears to be working, but I'm going to swap it out for another one to confirm. As for the dump valve query, I swapped that last night for peace of mind and it made no difference, I also took the other one apart and it was ok.
Turbo was bought through MT, but it came from CR turbos it was fully rebuilt an un-run so I'd like to think it should be ok, but I guess you never know. The hoses, clips etc are all new, as is about 90% of the car

The issue or confusion I have is, if I have to run "X" psi when should the wastegate start moving to open? Does it move at that pressure or before, I realise it's a big turbo so would it have to open prematurely, and the fact i screwed the rod up and it made fuck all difference tells me the actuator is either wrong or defective.
To answer Stu's question, I can move it with mole grips on the shaft, thats the way I normally do all my adjustments on any cossie, it doesn't feel any different to normal.
As for the amal valve jets I don't know, i know it has been jetted but haven't got any idea

i would like to clear up the actuator question first as it's bugging me that this is the problem. The car is very fast, and I've already destroyed 1 gearbox and the replacement doesn't sound too healthy now so although i want it to be running as intended I don't think it will last very long

if I can get the box to last a few months I'll stick a more appropriate transmission in.