Topeak bike rack mounting system

NOTE - the latch bit has broken on me when printed as is. I'm going to try printing it on its side, that should greatly increase its strength. A little support and touch up work with a file will be required on the round surface.

The sled to slide on the Topeak system, and the spring loaded latch to hold things in place.

I have a Topeak rack and a bag, but have thought that a plastic ammo box would actually be exactly what I want on the rack. Always waterproof, plenty roomy and I can bolt a