To anyone wanting to use a lipo and not lose the feel and balance of the nimh packs try the thunderpower Prolite G4 1800mah lipo. Wieghs 15 grams less than the nimh pack and feels almost the same in the Radio. Ive added some foam to stop it moving around and this has added almost the missing 15 grams.

IMO IP lipos are cheap crap and I will not use inferior products in such a high end radio.