Alright, the carbs and fueling is GTG now. ran right, hit the ton with lots of throttle left. Reving like a turbine again and smooth as silk again. that's the good. the bad. I buggered the temp sensor somehow as it stopped working, it's still hitting 16V sometimes even with the running lights and high beam on, not as often but still. Other than those 2 which I need to sort it is running great again. I'm pretty sure I did something to the wire for the engine temp with the last removal of the carbs.