Thanks for the information on your testings. I suspected a big difference, so lets speculate on this a bit further, taking into account your first batch of data, that makes for 2 seconds difference between Mono and Quattro, and lets put this difference as mid-minimum, as for using the non-optimum mono and (dont get me wrong) non-optimum tester.

The difference of 2 seconds time, on cca 10 sec run, relates roughly to 20% faster speed. So at 10 meters range it would mean 2 meters advance distance to monofin player, and thats more than a lenght of a player, at half of a playing area.... and much more than 2 player lenghts from goal to goal. That is surely a very big difference, making it worth exploring further.

For the upper speculation to become more precise, we need to test it with mono&puck versus player with quattros on 25 meters. Also there is a big "reserve" in testings, as nobody has timed his/her swimming with puck&mono. This is also something that needs training to get it right.

I think this is worth exploring further, and that the player wearing the right mono, with right training and changed team tactics, could be able to check-mate the opponents with sheer speed of monofin swimming. If the opposition team leaves full-back at the distance to counter this mono-player, its 1vs1 with huge innertia behind monoplayer (and every 1 second of swimming, a monoplayer gets 20 centimeters advantage) leaving lesser chance for full-back to stop him, and having only 2 backs is more of liabillity, than having only 2 fronts. I guess it would be hard to counter the monoplayer, but with a monoplayer.

Interesting... huh?