Hi, Thanks for the response. My assumption was that the part nearest the wall should be restrained with a boa wrench or similar and the other, equal sized part in front of it wound out. Otherwise the grouting would be damaged. But. I didn't want to try this out without trying to find out if this was correct. In the end I might just have to have a go. trouble is if I do break something I don't know where to look for a replacement.