Here's the "sleeve and bearing retainer" I was referring to. It's specifically designed to assist in snug slip fit or pressed parts staying put. Probably not necessary, but "an ounce of prevention is worth a pound of cure!"

www.ebay.com/itm/305568261620?

"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!