Novak already has one. Basically this is a new type of 'stock' or 'power limited' racing, using 1s LiPos (no need to balance or anything like that) and typically with a step-up BEC that produces a steady 5V+ output for servos, receiver, etc. from a single LiPo cell. Or for crawling.
http://www.teamnovak.com/products/es..._1s/index.html
It doesn't look like the castle has a step-up BEC built in though.
http://www.teamnovak.com/products/sm...ost/index.html