I'd love to figure out the best way to make a reusable junction through an outside wall for routing cables through it. (Specifically, ham-radio coax cables). It would be fairly simple if I was going to only do one, but I'd like to implement something that would let me add or remove cables over time. All the junction boxes I've found seem to not be straight pass-throughs though and have a hard back. I'd like to find one with a semi-sealable rubber flap that would let me poke new cables through it. I'd mount it high up on the ceiling under an eve to prevent most of the water issues, along with drip loops on the wires, but I suspect the real reason most people (and code?) don't do this is for rodents?

Or is my best option to do it once and make connectors to and from the outside with a fixed panel and multiple junction boxes vertically aligned with each other (one above the other, and one facing outward and one inward)?