Thanks chaps I'm putting a new front bag on shortly and will have a keek at the air coming out it again.
The previous owner said he put new back ones on a couple of years and had new new fronts but didn't fit them, why I don't remember what he said but I've now got them and put one so will do the other shortly.
I'm thinking about a spring conversion from Rimmer as it's the same price of a new compressor, not sure though as the purists and haters will speak up but then it's not them driving it.... just a thought though.
But as I say, I'll put the other new bag since I've got it and take it from there.
What I should say though..... after fitting the new drivers side front I got constant 4 lights on the button, before that they always flashed so see what happens when the pass side fronts on...... still won't lift though I know that so god knows what else will need replaced