My first G scale turntable was scratch built and or converted from an O scale turntable to G scale. I have been using this turntable for the past 5 or more years. Over the past few years I have had many requests to do a how to article on turntables. So when it came time to build my last turntable on my G scale layout ( The DAV&P ) I broke out the camera and took step by step pictures. It should be noted that this time I used and HO scale turntable and converted it to G scale this time. Instead of using a O scale turn table. I did have a few more problems with the HO scale turntable then when I used the O scale turntable, but both methods are vary close to each other. I only had 3 problems with the HO scale turntable. As we go threw the step by step construction you will see how to install and convert other scale turntables to your scale! Use the following link to see the article: http://www.eclipseauctions.us/davp/stories/turntable/index.html
This is a great tutorial. Please follow this link to post to the original thread. Thanks very much to phantom for taking the time and effort to post this. Here is a photo of the project. Additional search terms: scratch build built bilt turntable TT G scale O scale track steam engine house terminal