When I first built mine I left the batteries in the nose cone and decided once the balance was sorted I'd sort how I was going to charge it. I continue to take the cone off with the std two M3 cap heads and a wiha 2.5mm ball driver extended with a section of exhaust silicon! It takes 20 seconds to take the nose off.
I have no cradle and I'm just about right with two small Rx batteries and a 2700 2s ECU pack.
Dave