Got replacement bearings for pivot block W21-02L. Installed them per Sonex suggestion of using a bolt to pull the two bearings together with a flat washer to put the pull loads on the flange and not the inner race. The method worked smoothly, although one bearing cocked slightly part way in but pulled fully in ok.
This completes sheet ONX-W21 except for cotter pins in the pivot bolts. I'm sure I'll still need to remove the pivot blocks to updrill them for attachment to the fold rib assembly, W20-01.
