Whatever type box you decide on think real hard about going full portable and no power panel or big flight box battery.

I have set up many portable starters using many different types of batterys but votage is king. With just an inexpensive starter you can have the best performing starter at the field for cheap.

These are my latest setups a ten dollar 18volt battery, yes ten bucks on sale at Harbour Freight with just a block of balsa RTV,d (Silicon seal) to the battery and the starter the starter side is carved concave for the starter. Rock solid and a super starter.

John