That was the first thing I thought of Jacqui, but it's not that type of foot on the leg. It's like the one in the photo I've posted below but with a crutch type pin and hole fitting above the foot (moving the pin to another hole just made the other leg too short, though). I worked out that taking the feet off and replacing them with ferrules wouldn't solve the problem as it's not the feet that are the problem. The floor slopes under one so it's the leg length. I could, however do that with ferrules and stick the heel rubber on to the shorter leg. If I used ferrules the same colour as that rubber it would hardly be visible. I shall keep that to memory so that I can do it when I find out if I'm going to have to do it myself or they are. Thanks loads. 

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