I've posted this over on SMC and Woodnet, but I thought someone here might be able to use this.
If you haven't replaced your guide bearings yet, be prepared to. I had a grand total of maybe 10 minutes on my new 22401 when it started slinging grease.
Metal seal completely gone
Use the 22401's included hex wrench for removal
Everything will be reused except for the bearing itself
The biggest lump of grease left by the bearings
All of the bearings are removed in the same fashion
The tube of 10 new bearings were bought on Ebay.
Reuse the hardware including the sleeve
Reassemble in reverse order
All I have to do is replace the bottom bearings and I'll be done!