550 LF spindle broke again

Is there an upgrade path? seems like 3/4" shaft is too small.

This is 1967 model with power steering. I can probably get parts but hate to throw good money after bad.

Next 2 spindles were new aftermarket parts I think. Wheels are dished in. Last 2 replacememt spindles give more clearance (stick out farther). The original one had the tire rubbing but it may have had bent shaft when I got it. The end of the steering arm had the bolt worn off from tire rubbing for years.

Since this first replacememt the steering geometry seems wrong. When I turn R the L wheel lays over and wants to skid instead of roll. I suspect I'm not getting the right part or I screwed up the front end alignment (negative camber) somehow.

Looks like the industrial ( white 2-44 ) has bigger shaft w/1.25" cone bearing. Can anybody tell me if this part has is a keyed shaft? At this point I'd be willing to put on a different hub. I hate fixing this in the dead of winter out in the barnyard.

I have replaced the power steering pump with one out of a 96 hyundai elantra. Had to fabricate a bracket and rework the lines. Not quite as much assist as the original cessna pump, but good enough.