Suggestions ?
 Keep going mate, it looks like you're having a great time !

 Which one is you ? The guy in the helmet or the other one ?

I thought the same thing.

Sam, that's amazing that you even thought of foiling in the river, it's hard enough to learn how to foil but to do it with a variable flow and shallow rocks all around you....
 I saw all the different arrangements that the crazy foil can do.
 I know the current gestalt is to have rear foil aimed down but have you tried it with both foils set at the same AOA ? Zero ?

Sam, I've been foiling for 13 years but your river foiling is just mesmerising. I understand the dynamics of the 'standing wave' but the danger and variables of riverfoiling is something I would never have thought of.
 It's  such an interesting comment that the rear wing isn't in moving water due to the geography of the river bed, depth and direction/turbulence of flow.

I ask about setting both foils at the same angle , 0 or any positive angle because the current setup of having the rear foil set at a negative clearly slows the foil, even tho it provides the Down to point the front foil Up. With both foils set at a +Ve angle all the available area is lifting creating max lift and speed, the overall area can be reduced because it's more effective. You'd have to move back to balance between the 2 lifting foils.

here is a short vid of a run with the rear foil lifting as well although set as close to zero degrees as possible by eye ball. certainly harder to pump i think with a smoother technique this could be the go

after some rigorous testing (few beers and ~1 hour riding) im definitely in surf foils camp, with both foils lifting the board is extremely fast and responsive, you can power up the trough and catch up to the boat no worries when wake surfing. pumping is alot harder than with the 'normal' foil set up as it doesnt want to fall into the natural cycle very easily, it relies more in you lifting your back foot hard while pushing down on the front otherwise the whole board just goes up and down and you stop. i think there is potential here, just need to nip back to the workshop and whip up a sup board that actually works 

after some rigorous testing (few beers and ~1 hour riding) im definitely in surf foils camp, with both foils lifting the board is extremely fast and responsive, you can power up the trough and catch up to the boat no worries when wake surfing. pumping is alot harder than with the 'normal' foil set up as it doesnt want to fall into the natural cycle very easily, it relies more in you lifting your back foot hard while pushing down on the front otherwise the whole board just goes up and down and you stop. i think there is potential here, just need to nip back to the workshop and whip up a sup board that actually works

The rear wing has an angle of attack that creates lift or are you talking about neither wing having lift?
I have the entire foil set up shimmed with a positive angle of attack.