The bus has just failed it's Mot
with amongst other things a problem with the rear springs. Apparantly when it was lowered 50mm the previous owner did not replace the existing shocks with shorter ones. The MoT guy said he would have to fail it because when jacked up the springs fall out due to them not being held in place by a shortened shock 
My question to you guys is whether you can get shortened shocks specifically designed for shorter rear springs.
Over to you...............
