Bewdy Mate! Great detail! I am new to the SLS thing so this will be a great step by step to sorting it out. I am pretty sure the spheres are OK as the ride in the back seems normal but i have nothing really to compare it to, just what i would expect from any other vehicle. I did open the bleed nipple on the valve with the motor running and the fluid was quite foamy but i put that down to the pressure it was coming out at, would that be a fair guess? The boots on the rear rams are gone but no sign of any leaks, i think the car spent a fair amount of time off the road at some stage. I have read that the rams are pretty robust? I have no idea of the internal workings of the valve but could it still be faulty if the lever moves freely?