ST combo sets for DIY tractor projects. Includes ST Generator, coupler, and tractor gear set. See it here.**Updated shipping on our ST units.Take a look around and if you have any questions, please let us know.**Central Georgia Generator, LLC - A little information about us:Central Georgia Generator, LLC, started as a division of Milledgeville Aviation. It is now a company of its own and is Central Georgia Generator, LLC (CGG). We are staffed by highly trained and motivated employees that go out of their way to provide you with great service. We strive to provide the best customer service you can experience in the generator business. The staff of Central Georgia Generator, LLCunderstands the value of personal communication between customer and provider and aim to provide each customer with a great product or service.A little about what we do:We carry single and 3-phase brushless and brush generators to include parts for each type. We also carry PTO gear boxes that will take a tractor 540RPM and output 1800RPM for generator use; we also carry a 507 to 1800RPM PTO gearbox. If you have any questions, please give us a call or send an e-mail. Video showing how to determine bell housing size.Click here to be directed to “Useful Information” page.Engineering document from customer, George, on his project. Click here to see it.