A: under normal use, the leg swing handle is placed in the hook, and the leg will not appear natural glide condition.
The 1. leg to recover after removal of the handle (placing the toolbox), in the process of running leg due to natural vibration will lead to slow down, the leg and the ground touching damaged sandals.
About 2. connecting legs intermediate shaft (CFST) connecting bolt, nut lost, left leg driving by the vibration of the natural slow decline.