Always had good performance from our Mover, mostly! Sometimes had problems with roller slipping on tyres, say, when trying to "mount" a levelling ramp? but in the main, ok and always very useful. However, of late, now I have to reverse"up" the drive in our new home, I'm finding roller slippage more common. I've slight reduced the un-engaged gap twixt roller and tyre to about 15-18 mm, still finding drive is not too positive. I guess the tention springs on the mover may want replacing? is this a job I could find spares for and complete myself? Thanks for any forthcoming advice.