I added this steel sheet counterweight to bring the balance point down, since compactness was a bigger design requirement than weight. A brake is activated when changing the eyepiece. 4 altitude bearings are mounted at the mirror box. When looking close to the horizon, the instrument can be tilted for a more comfortable view. For transport all parts like bearings, secondary - eyepiece assy., eyepieces and bolts fit into the mirror box, separated from the mirror by the mirror cover.
All components are very stable and motorbike approved.