Rather than all of that hot-melt glue for securing the coax inside the box, I simply loop it (coax) around the screwpost. It's a very tight fit, and imobilizes things quite well in an easily reversible fashion.

I also now ignore the pre-drilled hole for the signal cables -- cover it with tape -- and drill a new hole through where the two halves of the box join. This makes it really easy to insert/remove the electronics, with less stress on the wiring.

Cheers!