Climbing walls are great. I don’t mean just because they have a roof on, and you can find the damned things without handing over your dosh to RockFax, but because someone has gone and pointed out where to put your hands and feet. They should do that on the rock outside. Why not? They could paint RH, LH, RF, LF (that’s right hand left hand, etc) as you go up, then there would be no arsing about. The more I think about this the better the idea seems to get. They could also revolutionise trad by writing by the cracks what gear you need to place. That would save a lot of trouble.