Did some more tests & i am still not sure its right
But will have to wait till after wkend now to b sure.
I tested the pull away in 3rd & she pulled away & traveled approx 50yrds b4 struggling/tried to stall.
I checked the bitting point & it was vertually right @ the top. It normally around 1/2 way b4.
When pulling away in first the acceleration needle went up, then slightly bck down & up again - I am assuming this is flucteration
It was very itermitent this morning but the same as the last few days coming bck
But think i have digsnosed thanks to tom/his chilli what the sliding/juddering is, i am 99.9% she is minus some wheel weights but my wheels are so dirty/black i cant be defo sure. I am going to have another look 2morrow.