I'm working in an idea but probably wouldn't work for stick packs...brass lipo tray as Rudebits one for Asso. Bigger to the front to move weight balance as near to the front end as possible, plus adding strength to this part. After that some alu post and thumbscrews for fast "rebattering".
Probably I'll tray Danny setup, with one pack almost against the motor and esc in the back. After that end balancing with the rest of weights. Easy, isn't it?
If I use all this time to another issues, hunger in the world would have disappeared.