Sorted out the binding at the rear servo and that tightened up some of the freeplay in the splines. Assembled the steering to try it out. Rear knuckles need higher mounting point to prevent binding when acticulated. Easy fix. Inner tie rods will need threadlock for final assembly.
Ackerman geometry was only mediocre in CAD, but looks to function pretty well. Neither tire scrubs when rolling through a turn. I like it. 2S lipo on the drive is justright speed wise. Good control. Slow if running on the "road" with trucks.
Couplers on the axle shaft are a press fit, but do spin under high torque. Pinned one pair with a 1mm stainless steel rod. Buggered up the ends with the welder to retain them. Need to do the other pair.
Also got my sherline mill out of storage and freshened up. Nice to have a capability again. Been eyeing DRO systems after reading ddmckee's conversion.