I thought I might post a link to a website showing the build of an astronomical clock for a client. I send him regular photos and then he compiles a monthly report, so if it is acceptable I will post the link every time his website is updated. It is not an engine but has cams, chains, gears, castings and also timing and running issues! It starts here: http://www.my-time-machines.net/my_current_project3.htm and the construction index is here:http://www.my-time-machines.net /astro_http://www.my-time-machines.net/astro_10-16.htm the last post is here: The construction spans more than 10 years and there are a few more to go. Unfortunately this is not a hobby but a commercial exercise with the constraints that go along with a contract. I hope you enjoy it.