Your backstory and design sounds good. Personally, I've never been convinced that the ringship was a Warp Vessel. It could have been a sub-light cruiser of the 21st Century, or might possess a FTL drive that predates Warp Drive, though not as fast/effective as the later invention.
"Canon is only important to certain people because they have to cling to their knowledge of the minutiae. Open your mind! Be a Star Trek fan and open your mind and say, 'Where does Star Trek want to take me now'." - Leonard Nimoy