Because of a duplication, Page 1, Post 1 of this topic has been revised. It is now about a Homemade Operating Turntable, with a pit, that costed $10. The Post 1 shows how the turntable, was built, over 44 years ago, and is still working on my layout. I always considered an operating turntable the ultimate operating accessory for a model train layout.
Post 1 on Page 1 will worth a look.
https://ogrforum.com/...ou-have-built?page=1
Charlie