I had a bit of difficulty with the previous version of the Hornby 0-4-0 regearing project, in that the gears were a little too close to the chassis and some flex in the mounting allowed the bracket to move a bit, causing tight spots in the mechanism. It was also a little speedy. So, everyone knows that when you have a problem to solve, the easiest way is to make it more complicated, no? I've test printed a new version with an additional compound gear in the train, and hopefully this version will be a bit slower and more stable.