I asked our customers and sponsored pilots, and while there were a few that insisted on a case (mainly the jet guys) everyone else wanted it small and light as possible by having no case. You could put 10 sets of 22awg power inputs into the board right now. I use two sets of 14awg wire myself on my jets, giant scale 3D planes, and anything that is going to be using some serious load.
You can use multiple X10+ boards. I use several in my jets to get all of the channels I need. You can program the output ports for any channel, reversing, offset from center, etc. The price point is not incredible, it's realistic. I hate when people charge $150 for $10 worth of hardware.