Wanted the fuel cell, battery and starter in the bottom, and wanted the quick charger inside to keep it from gettting banged up.
Found a tall, thin 1 gallon Rubbermaid jug that fit PERFECTLY, picked up some 1/4 inch hardboard and started hacking and pop riveting

(What a marvelous invention!

).
Made a three-section partition for the fuel cell, battery and starter, with the charger in a separate compartment above the battery. Will have enough room to put on a false celing (floor?) for additional storage... Maybe props, voltmeter, tach... ???
Still working on padding and securing the components and the locations for the miniature power panel and fuel pump, wiring and plumbing..