Re smaller hatches and sikka (and it's a good idea Chewy) but if the hatch is smaller than you'd like, being able to remove the frame for a day's wiring is a real bonus. I'd not sikka it in but cut a big patch from some suitable material (butyl or suchlike) and screw it under the hatch as a gasket, then cut the opening out. Waterproof and removable - gives you another 2-3 inches of shoulder space if you have to spend some quality time in there with the crimper and soldering kit.
That reminds me, my next console will have an internal light in it