This thread has been a fun read, with some nice-looking setups. I plan to try this for my 22, simply cutting some 1-inch steel conduit. I'll keep the original legs so it can always go back to stock.
From reading this thread, I realized that two legs need to be shorter if there will be wheels. But I don't think I'll have wheels; I'm planning on something to be carried and parked, with simple rubber crutch tips.
My reason for wanting this is to have the kettle at a convenient height when sitting in a camp chair, sort of like an end table for a sofa.
I love to play with tube cutters and I've already cut conduit to make wind chimes (they always ring in minor notes, must be the texture of the metal). It won't cost much to get some pieces of conduit and dink around with different lengths of legs.