Garmin Varia Radar mounting points

Where to install the Garmin Varia radar sensor on Brompton securely (or other bike), depends on circumstances, with or without luggage, to avoid any obstruction. Option 1: Zip ties under saddle. 3 wide horizontally and 2 small vertically to avoid falling down. (Still looking for something to replace zip ties) Option 2: On helmet. Garmin…