[Bill]

Ricki
I'm your boy. My Aqueon was stolen about thirty years ago and I've looked for another (off and on) for a few years. Thanks for the lead. Waiting for a reply.
There are at least three design 'errors' in all the monofins that I've seen and the Aqueon fixes two of them. The on-the-fly adjustable blade stiffness works great too. Since I cannot get a monofin to work better than my C4s in any mode, a comparison sounds exciting. Even thought about stealing the design fixes and applying them to mono and/or bi fins.
I have a visual memory etched forever in RAM of pointing down in deep, clear water and hitting 20 meters so fast that it scared me. Maybe I'll get to do it again, sinuses willing.