Topeak Bike Rack Light Adapter

Topeak brand bike racks have a bracket on the back end which you can fix a light onto, but only certain lights fit. My tail light had the common design of being intended for wrapping around the seat post, with a rubber clamp. So I made this adapter which is the same diameter as most common seat posts, to give the light something to grab on to.

I used 1/2" long 10-24 bolts to attach it, and M5 should work as well. Although you don't necessarily need the bolts; the wraparound light will hold i