Bertiboy,mbe careful, seems to be some missing msgs. I bought a pair to fit to my Coachman 545, about 4 years ago at the caravan show. Went back the next day and bought a new caravan , with the shock absorbers, got my money back but cost me another 15k. But very happy with the new caravan. I also have a power touch mover.
I would say YES, well worth fitting,
Hutch