Was a tad disillusioned with CN content when I came in as a "non registered newbie" and started wading through the Forum topics. Not wanting to read 2,000+ odd chit chat on some threads that seems to be between a selective few members, that often had little to do with the topic, and would not enduce a newbie from signing up... in fact would be quite intimidating... something I have found on many other forums.
I picked this topic due to little activity.
Back to topic...
Disclaimer... I'm about as close to an engineer as the bar car on a high speed, driverless train.
Stumbled across this thread... with my limited knowledge, I would opt for good quality sealed bearings... and a regular blast of air on the lower ones... might take 5 minutes to fire up the compressor, but a 2-5second burst will have you coughing sawdust and when the dust settles, clean bearings.
If your first cut is too short... Take the second cut from the longer end... LBD