Yeah, I gathered. Thanks for everyones help, I did a hard sprint while holding the brake, and while I most likely need new pads, I secured the cog firmly, and the lockring plus milk-jug spacer is on there tight as a drum. To test it, I got going, then pulled back, hard, with both legs, putting most of my weight on the back, WAYYY beyond any street move, and nothing happened except some spoke-settling sounds. Thanks again!