Thanks for all your input guys. I have a chair that goes quite high, I think the problem is this size of the cut out. The link to Ganoskin was quite in depth, a bit too much for a hobby jeweller although I spend about four hours a day making stuff. The dustbin idea was a good one Carole but one problem is wheelie bins rule in Exeter. Decided that 24 inches would be good, so tomorrow the jigsaw will be full power tomorrow.