Stanley Steamer posted in this forum under Technical tips, builds,help but if you wanted to follow the build you will have to go to the unofficial Mamod steam site same section. What you say about the Mamod roadster i find interesting what i used is a small micro v twin still to steam it hoping to get some figures so that someone will understand and be able to help if things go wrong. Ratio 60 : 1 using a worm drive