*I ended up getting a set of 8 sealed ABEC-5s for
25 bucks which let me replace the whole lot with a couple of spares.

Turned out that a couple of the bearings on the lower guide weren't
turning at all, and at least one more had something wrong with
it--periodically when one or the other was contacted I'd hear a whining
noise--that's gone.

J Clark

Next time do www.vxb.com for bearings. Great service.

Bob AZ