[modelman]

Rvjimd-I really admire you for taking on a project this small. Having built a few complicated models that were medium in size but they were giants compared to this one. I have really bad eyesight and I promised myself that I would never take on another "small" build. Just a suggestion for the slewing gear. You need a large gear under the base of the model and I think a servo like you are using will work to turn it but it needs to be slow if possible. They make plastic gears for helicopters I think in the 3"-5" range and that could possibly work. Most draglines and big shovels use a gear almost as big as the house. They also make matching pinion gears that you probably could adapt to your servo. Keep at it and post lots of pictures and good luck.