I just got back from the Portland Boat Show. They had the flow there. Our dealer that does Moomba also does Malibu, Axis, Nautique, and Supra. So pretty much all the boats had surf devices.

The flow was coolest for me from the ease of retrofitting perspective.

Here's some pics:

Retracted


First position:


Second Position:


There was a 3rd position where it stuck down a smidge more, but I didn't find that notch until later and don't have a pic.