GoPro mount adapter for Silva Cross Trail / Speed Trail series of lamps

I use frequently my Silva Cross Trail 5 headlamp as a bicycle lamp. Silva Cross Trail lamps have a bar-mount adapter making them suitable as bicycle lamps.  The elastic band of that bar-mount is made from silicone rubber, however, which has cracked just after 2 winters for me.  Moreover, I have multiple bikes and I frequently move the Silva lamp among them.

I also own and use various Garmin gadgets on the bike, including a Garmin flush-out computer mount, which offers possibility to mount both a computer and a lamp. Garmin's own Varia series of lights use a GoPro compatible swivel mount to connect the lamp to  the computer mount. This gave me the idea to make a Silva Cross Trail mount to GoPro mount converter mount.

I do not recommend PLA for this print due to the outdoor usage (PLA can easily go soft in direct sunlight), I printed it with ASA.