I ordered a pack of 50 of these stainless steel zip-tie bases. I had been using some white plastic mounts, but they’re not particularly strong and will likely become brittle over time. Since we’re not quite as weight-conscious with the car as we were with the plane, I don’t mind the few extra ounces these will add for a much more durable mount.
I also swapped all of the screws that hold on the chassis aluminum with some torx-drive stainless screws. I’m really glad I removed all of the hex-drive stainless screws because I stripped about a half-dozen more just in the process of removing them (out of about 50 screws). The torx-drive screws are virtually impossible to strip.