Leading edge is top importance, since the flex of the leading edge defines how much your sail changes shape in flight... As an experiment, hold any Rev by the leading edge (face up) and bend the leading edge like it does in flight, now look at the center trailing edge as you do so... Note how the trailing edge raises and lowers with the bending or unbending... That is the "open and close" of your throttle, this has a greater effect on your drive than the true "angle" of the leading edge.
Also, when the trailing edge does open or close in flight (from bend), it changes what throttle position is needed on your controls (hand adjustment in flight)... Accordingly, I don't choose frames for weight, as much as I do for the amount of flex it will give me (moderated).
If your LE is too flexible, you'll spill wind too easily... If it's too stiff, you won't be able to load effectively.
Soak that voodoo in.