The only advice that I can gove os keep it simple. I can see what you are saying about you and your brother, but your talking a split second between the 2 starts if your engine runs well and start easy. I have a prefab, glue it together yourself box, holds 1 gallon of fuel my panel and my battery, all my extra hardware and parts in the drawer. Not to mention the area I made to hold extra expoy(for field repairs) as well as the one I made for my after-run oil and CA glue. I also made a plate with holes where my screwdrivers sit upright.All of that stuff is jsut in the top of the box, and the other half holds my TX and misc. other things. Space is tight, but I organized it,ran wires cleanly and was very perticular with the way I did things. Not only does it look awsome and sleek but its easy to get around. The last thing I would want to do is haul a HUGE box around, its jsut more work. Even if you and your brother were working off of my box you would be just fine, 1 gallon of fuel lasts me a long time. And I fly often, ITs really up to you but i would suggest keeping it simple, you might be glad you did.