Varia Radar Mount for Ortlieb Quick Rack v2

After making my original rear mount for the Quick Rack, I realized that the zip tie holding it on was working in tension- with the way the light is cantilevered off the back, its weight is helping pull on the zip tie, ignoring the contradiction that a zip tie is supposed to be used in tension anyway.

Moving the support to below the cross brace, the support is pushing against the cross bar instead of the zip tie holding it there. So, in the event the zip tie fails, the weight of the rear light will mostly hold the mount in place, or at the very least, it falls toward the front of the bike and scrapes against the tire. With the previous mount, if the zip tie broke, it could pivot backwards, wedging against the tire and possibly causing a skid. It probably doesn't matter because the 3D print is more likely to fail before the zip tie.

I also added a couple of bumps so the mount lightly snaps onto the lower rear cross bar.

Finally, I added a hole to the top of the mount to add a shroud so a bag on the rack won't press on the top button of the Varia and turn it off. I haven't yet designed the shroud because I cannot find my 500-series Varia to get the proper dimensions. I did not lower the Varia because I wanted it to be farther from the tire. (edit: I have added some, untested lower versions of the mount that get progressively harder to install.) I did move it closer to the rear cross bar so there is less torque on the mount when hitting bumps.

A drawback to this design is that any dirt that falls on it is more likely to get caught in the top hole and any upward-facing cracks, like by the forward cross bar. There is only one version, for 20mm spaced 3mm mounting holes, but the BarFly variant is in the Fusion model. You may also need to remove the wheel or rack to install the mount.