The fan bearings are tapered and are poured Babbitt so its going to be tough to replace them unless you know how to pour babbitt bearings I have to do its to my lever forge too I think the ratchet drive bearings could be brass bushed since I dont believe those tapered
But 3000 years ago they didnt have THIN CAST IRON fire pans that crack if you dont insulate them ..... I'm going to at least CLAY mine before I EVER build a fire in it thanks for the heads up
I am told you should seal up the loose fibers of the Kaowool with a layer of Castable Refactory poured over the top.
Breathing Ceramic fibers is harmful