vspider

Why didn't you choose more sturdy and reliable design having so much space inside? This can be improved adding molded supports around the socket to reduce mechanical stress.

Hope they will reinforce usb port (at least use some type that have in-plate mount, not the simpliest solder-on), which is more reliable for frequent charges following relatively low module capacity.

@Ankoku Thanks a lot! Now I'm thinking of Archimedes screw module as I have many ribbed hoses and one interesting idea for half-bound floor (see images attached)

I'm starting building GBC as completely new theme for me, which module would you recommend me to start from? I have pretty decent amount of Technic and system parts (see my rebrickable profile), plus I'm participating in LUGBULK, so I can plan for needed parts (Technic bricks for example). I've already bookmarked over dozen of layouts on RB, which is near 100% match in my parts. Previously I had experience building big rally and trial cars and some floor railway layouts (non-automated).