Thanks for that. The panels that I'm referring to are a bit more difficult than in the picture as the house is higher and the ground falls away slightly at the back. I clean a dormer in the rear roof with a 48ft Extreme. I can see that, on the back, 48ft won't be quite enough for the panels. So I will be popping on one of the extensions. That should do it but it may even need two judging by where the dormer is. This is the side where the worst of the green is too. The front is OK; 48ft will do it a lot more easily as the ground is flat. I can't see me completing the back in much under an hour by the time I've set everything up. It's a long hose from the van too.