Hi Jim,
Good runner, Tony. It seems to run at a good speed without the need for RC. My Ruby used to fly off the track.I don't know if it will help; over the years I have played with a number of Accucraft Rubies. As I was playing with them means there was something wrong with them, the ones I have seen in general were poorly made and put together; though after some tweaking they usually performed okay.
This might help you:-
https://youtu.be/m4dpa8dFpn8?si=pvyI5N3zNgaFII6STake care Tony.