Sorry to hear that Adst,
"lowered" mine recently in a similar controlled manner, due to forgetting (old age

) to unlock steel hawser attached to rear wheel in garage. Bike went over and away from me, hitting right mirror on wall before resting, luckily on push bike that was between CR and wall. Only damage was broken mirror head and cycle tyre mark on top box (easily polished off)
New OE mirror £50.14 and that was literally the glass/plastic head and steel shaft, not the lower screw part nor plastic cover at the base. I had feared for the taller screen but that escaped totally along with any other damage to tank or panels/exhaust.
Took both me and the missus to right her, being awkward as she was jammed against the wall (bike not missus!)
