It sounds like you've done your homework well- - - - -good on ya! I'd suggest securing the inner spacer to the spindle with some green Loctite to avoid any possibility of it spinning. Can't do that with the outer, so make sure the spacer is a snug fit, clearance-wise!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!