How would you make a good pivot-arm suspension?
I got inspired by the idea of a vertical Slewing Bearing.  I made this “horrible”  prototype to demonstrate the principles.



One side of the assembly has a fixed wheel attached to it using multiple pins. The other side has multiple bearings.  The idea is that the vertical weight is shared between the bearings (on one side) and between the pins supporting the wheel  (on the other side).  This way, the axle supports only a part of the weight.  In the final design the axle should be much longer and use many bushes preventing the two sides from separating.