My tigershark from the video I posted with the aluminum hull is up for sale. $3000. Yes, most of he value is the detachable aluminum hull. 45 mph with the aluminum hull attached. Very stable with a low 12 degree deadrise. This is great river runner. It comes with plenty of extra engine parts, and a extra 1000 cc engine( for parts). I just started working on a aluminum hull for my new Spark. If intrested, just send me a message.