Juluen (Axixtech) B18 Dual LED Beacon Rundumkennleuchte RKL Festmontage > Magnet Adapter

Those Juluen (Axixtech) B18 Dual LED Beacons are great, but the magnetic version comes with a great price (240+ Euro).
Blue or yellow (not Dual) ones are cheaper.
You can get the fixed assembly (Festmontage) Dual for less than 100 Euro.
I added four 34 mm 12 kg magnets (eBayDE ID 405598577810), they are stronger than the original 250 km/h magnets.
I guess three would be enough, so I designed a three-hole version.
There are also two versions (three- and four-hole) without space for wiring (if you want to drill a hole for it somewhere else).