After going over the car after first full day out I noticed what others have mentioned. The arm mount blocks pivoted some and all 4 arms that started the day with zero slop, finished with more then I care for. Didn't hit much either so something needs to change there.
Considering building alum. arm mount blocks that have an outside set screw that would lock the pin. This would eliminate all pin slop and put an end to block pivot issue.
Anyone else found resolution to this? I suppose eliminating the shim washers would help some by increasing block seat contact. Another option is to find small serrated washers that bite in enough to eliminate pivot.