Yup exactly what you need....should fit right on the spindle
The comtrol ring is a bit tricky...the short version is to get a ultra sonic cleaner or cheat like i do and find a jewlery store that will do it for you.
the mothers and most of them are simply jewlers rouge that's disolved in something like mineral spirits ......its made with white jewlers rouge
Hot water soak and a toothbrush works also....
I actually have this 6" Ryobi bench grinder (3,600 RPM max)... I'll have to find a buffing wheel for it. I have a dremel, too, if there is anything I can use that for? It's one speed, though.. and I think it's 35,000 RPM.. probably too high for anything like this?
As to your brass question depending on conditions and your skin expext to need a polish between 3 days and every couple weeks. I personally don't mind the tarnished look but I like classic brass stuff.
I've learned to love tarnished brass. It was either that or go insane.
the more shiny the metal is, the less the tarnish sub