Bob would you mind sharing how you improved the thrust bearing to take the burden of the side loads?
I found a local supplier of bearings and bought a thrust race which has 4mm ID, 10mm OD and is 4mm thick. Cost was £ 5
( $ 8.40 )
Next file off the little lip on the cone which locates the spring washer.
Put the cone on the axle reversed ( large end to the bearing ) which will put load on to the outer race and not the inner race.
Put the thust race on the axle and follow it with the spring washer
Then use a narrow TC3 alloy wheel nut ( Trinity supply ) to fasten it all together.
Because the 10mm dia thrust race is smaller than the hole in the wheel the wheels still go on and off as normal without stripping the diff.
Diff is now really free, The spur can not be made to slip with your thumb and lasts for 4 meetings without any maintenance.
Thrust rece has been on the car for appx 12 months now and just needs a clean each month.