Complete frame
Complete frame with both "bearings" in place
The upper bearing (upper left "tee") is only a slip fit, not friction, to the short coupling pipe in the 45ยบ ell. It needs to go on and off easily.
The lower bearing accepts the threaded end of the axle nut. It's a loose fit, so the axle turns w/out any noticeable friction.
Being paranoid, and seeing as how the lower bearing is submerged, I didn't want it accidentally coming apart! So I did drill a hole though it, and it's inner coupling pipe, and put a tie wrap through to secure it.