I know you have sold Altered but I was looking at photos of your set out. Specifically the main ending on tramp and tidy spinny cleat as a result.
Also it seems you can naturally lean back on the trap and triangualate your stablity from there.
my question is did you have a sissy line to stop you going forward in a nose dive?
I have always liked the centre tramp main but it is not popular and I suppose you have some thing to hold onto to stop you going forward??