I knew the bottom shape of the Mule was not ideal and it was apparent when I rode it. There was too much volume in the first third of the board and I felt that the rails were way too thick there too. Because of this, I had to stand really forward to have any control on the board. I had some directional control standing up, but not a lot. I could bellyboard it just fine, but standing up was really tricky. As it is a prototype, I had no problem taking the planer to the bottom and reshaping it as I would a foam blank. I reduced the volume and thinned out the rails, giving the entry a much more conventional shape.
Big difference on new and old rail.
I'm hoping this will improve it's behavior. Next time I try a radical shape, it is going to be in foam and not wood!