undrwater
Contributor
You can see in the video here that the fins don't silt when using a flutter kick, even close to the bottom. If the diver is not using as much effort to flutter than one would when doing a frog, that might preclude the need for the frog kick (the intent of which is to have an efficient, non-silting kick, yes?).Frog kicking works out wonderfully but the style is slightly different. If you try to do a classic frog kick you will be disappointed. But a slight modification results in an easier stroke, less wake, and more effective speed. Of course the speed can be traded off for less effort. Why work hard when you don't have to?
On the back kicks the jury is still out. It appears the MaxAir does not back up as well as the boards everyone is using now. They were designed to go forward. That being said, Judy, a senior fish identifier for REEF tested the maneuverability of the MaxAir swim fin prototypes. She found them easy to use with no significant problems. Here is the video.
A back kick is really important for many (I'd bet Judy thinks so too!), and I wonder if you broaden the edges slightly, you might get a better back kick out of these fins?