well after a bit of a struggle managed to loosen the screws without taking the TB off, ive put more preload on (turned it anti clockwise) so now just have to take it for a drive once the ice clears abit!!! Did stall a couple times when i tried to move it forward on the drive but assuming adding more preload shouldnt do that?! So will put it down to it being cold and it not being started for a week!!

Have also got a spare one i had at my parents i can try/use, is there a way of actually setting up the preload properly or is that something thats only done when on the rollers/road tune?!

Obviously if i had an aftermarket ecu i know that would tell me all i need to know but be a while before i can afford 1 of them lol