Watching Paul Bradburn the other day and he used an interesting little creature which (I think) he referred to as a concertina gauge. Basically it's a little doohickey that rests on a surface and can be stretched so that each end is on a desired point on that surface. It then automatically divides the distance between the two points into equal sub-lengths and you can mark them off accordingly. This would be handy for decoration among other things. I've done some searching in the UK but I can't locate one. Any ideas?
FoggyTown