Here is my box for nitro powered planes - I'll build something similar for the jet over winter.

The basic chassis came from B&Q ( Home Depot) and the upper half detaches with two clips on the sides. In the base I have fuel and two 12v gel batteries and the power panel. I installed a 24v outlet on the side ( both batteries in series ) and they operate in parallel to supply the power panel.

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The upper half has a lift out tool tray with space below for a starter; boxes of useful stuff; my insurance document; spare props etc.