Well, what can I say.... except great big THANKS to Flossie...
We have working air suspension now!!
Without his meticulous intent of getting to the bottom of this, I simply wouldn't have got this far ..not only was his Nanocom a fascinating (over my head ) piece of equipment, Flossie's determination and process of elimination with methodical working out, made my day most interesting too!!
I learnt a hell of a lot and it's made my head spin still, I hope you were fed & watered OK Flossie and we must catch up very soon again.
So, thanks to everyone's input here but with respect too, mostly to Flossie for sensibly living closeish and his determined, methodical attitude too!!
Titch....