This is an Arowana 22.2" mono EP hull, allegedly self righting, however, on it's maiden run I turned it too fast and flipped it, sadly the self righting didn't, and a hatch clip failed, the end result was that after about 40 seconds of being upside down, the back end dissapeared, and it ended up 70% submerged with about 6" of bow pointing towards the sky. I have since had a play in the bath, and cannot get it to self right, also it leaks water from the factory fitted divider for the flood chamber, so not the quality that I thought it was, don't quite know how to rectify that one.