Another fun mounting place with low cost is to remove the round yellow reflector from the fork leg on the non- radiator side and mount the Roam there via the threaded hole on it. Go to hardware store and get a couple rubber washers, lock washer and a 1/4" thread bolt or threaded knob. Total cost $2-4.00.
Put the lock washer on inside and rubber washers between reflector bracket and the Roam and you have a really sturdy, vibration free mount. Just did a really tight 35 mile dual-sport event with this setup and it was rock solid.
Have fun with the Roam.
-Bikeman