GREEN SCOOBY

its been jumping lately and before i get ripped off taking it some where to get the laser cleaned etc i thought i would try and position it in a better place to see if that helps.It is currently bolted to a shaped hard wooded board that re places the one that goes over the spare wheel,which means that the changer sits in between the spare wheel.Its been there for three years now with no probs untill recently.Can anyone give advice and pictures were to put it? ive tried under the seats but it dont fit.

cheers