Discrepancy in VW1302

Newly constructed measuring device for horizontal wheel inclination revealed some ugｌy discrepancy in the rear total direction, thrust in air cooled VW 1302 Super Beetle this morning. Too much value of the scaled datum might mean a hysteresis in rear trailing arm hinge bushes especially outer ones on both side? Careful inspection must be done, because over 40 years old rubber bushes there must have been deformed and hardened loosing original physical property.