Thank you both for your comments and Terry for your fitting instructions. We are going to consider the purchase first as it is certainly quite an outlay.I have a Specialist cover for my Senator. It's great and keeps the van clean and stops UV damage through the windows. Fitting can be a pain though. I have two extendable poles with broom heads attatched. With these you can pull the cover over without too much difficulty. We find it is easier to put it on from the rear of the van first. Keep an eye on the parts of the cover that wear. Surprisingly they are at the touch points where the aluminium bars are fitted to join the roof to the front and rear of the van. Glue additional pieces of the cover (repair patch supplied) to these touch points.