Nice work on the electronics tray. I think this is a very good idea. I have EL-MOD components to add to this mix as well. The idea of a modular tray to share between tank chassis is a great idea. Terminal strips or plug-ins then make it very easy to swap them around. I think if you built 3 or 4 modular electronics trays, you would have all you need. I have 6 tanks, but truthfully never have more then 2 or 3 out at a time. SO I am thinking if I took this idea and built 3 trays complete with EL MOD components, I would be set. I could then keep the extra heng long boards as spares or sell them.