Andy, I was diving foot-heavy initially on my rig (Edd-modded SMS100)......but they fixed that pretty easily. I think you could try something VERY similar on yours (it seems like you're half way to an SMS100 as it is). Their fix is just scrunching the crap out of the top of the wing. If you tighten the bungee up drastically (they've even started routing it through non-stock locations now)....you can crunch the entire top of the wing up and still allow slack in the bottom of the wing. I instantly went from feet-heavy to almost feet-light, and it took them two minutes to change it. Maybe something like that would work?
Another question: I know that "theoretically" the welded d-rings aren't as safe....but Edd installs nothing but welded d-rings on all of his modded harnesses, and he squeezes through some tight and tiny stuff. Maybe it's easier to clip in the tropics, or smaller restrictions in the tropics....it's just interesting to note that Edd is pushing hard in SM and is going purely welded while everyone on here is against welded (and in some cases, any) d-rings.