I have a Kyosho pre-fab flight box which is nice but nothing special. I also keep a $5 cheapie tackle box in my car that has spares (and first aid supplies) that I don't want to clutter up the box I lug around with. It's bad enough with the 12v motorcycle battery and a gallon of fuel!

A couple tips: I have a metal gallon can, rectangular, and I added bungee coards to the box to support that in addition to the Velcro strap. I have found that if I use a 4" bolt and a wingnut through the axis I can carry six spare prope of various sizes tucked under the bungee on one side, and two long shank standard and one Phillips screwdriver on the other side. Very handy.

I opted to run everything off the 12v battery (starter & glo-driver) and it solves some clutter/bulk, but it can be a pain to manage the cords. I hooked a "Zinger" on the box and attached the tool clip to the middle of the glo-drive cord, and by placng the box beside the plane with the panel ahead of the prop arc it will pull the cord away from the prop; and the starter cord is heavy and easy to keep in control.

I drilled a hole from the upper tray down through the lower slide-out drawer in the back corner. I stick a 3mm x 6" long handled Allen-wrench through the hole and it keeps the drawer from sliding out. (And keeps "borrowers" from helping themselves when I'm flying - it is not obvious the way I designed the "tool holder" that the one long wrench is in. I can tell the world now because I now fly at a club where everyone is honest (and has better stuff than me).