Here is a quarter sclae merlin, but it doesn't have any vid or sound of it running. I have talked to the guy who does the castings and it is over $2,500USD for just the drawings and castings. You will need a good lathe and mill to make it. Would be fun but I just don't have the money tree in the yard producing yet. http://dynamotive.netfirms.com/merlin/more_info.htm