Yeah the CMX looks a good one, but if you have a six by four can't see the benefit of spending that much. Quite liked the Gaugemaster 6M60 wheel brush, but if you have a long loco, or a steam with tender, you have to purchase two and put them together, more expensive, I was using a track rubber with a cleaner afterwords and a vacuum cleaner with small brush on the lowest setting, but read that this could damage points, lifting some spring, but mine seem fine.