I haven't seen that one but when I first met Frank Carter in the very early 90's, he came to me looking for some help tuning an outboard on the rear of a 501. Later on, Frank converted it back to an inboard and ran in the 8 or 9 second class for quite a while. I think it was the original Aquaholic, at least for Frank. Later found out that this was a boat the John White had owned and/or driven in Pro Gas Hydro before the capsule rule. Don't know what became of it after Frank went fuel racing.