[StevenB]

Zip ties are a great way to secure your motor controllers. As others have said, they're quick to put on, quick to snip off, and nearly unbreakable. Just to be clear though, you should be zip-tying them to something secure, like a lexan panel with holes in the appropriate places or a punched sheet metal mesh.

A few years ago, I became a fan of tapping the lexan mounting plate and using #6 screws to secure motor controllers. In places where you can't easily reach around to the other side to push a zip tie back through a hole, this can be a lot more convenient.