Thanks for your reply.
As you say we'll get the new bags in and start a new thread if we're still up the creek!
In brief what drew me to the thread was seeing the photo of the missing front crossover solenoid valve along with similar 'back end'...
2003 Td6 3.0 RR Vogue
Hi
My son and I are just going through pretty much the same scenario working on my car....compressor has been refurbished and new height sensors all round, rear and tank valves refurbished, currently got a leaking n/s front...