Wild Alaskan had the lock idea. I love it. I will do the same thing next time I'm at the hardware store and I remember.
For fun you may want a
REMOVE BEFORE FLIGHT streamer. they come in many sizes.
www.sportys.com
The mirror looks great, but I would want two. I'd think you'd have to amputate the end of the throttle sleeve in addition to the grip to fit it, however.