Freedivenz, clearly you know your stuff well. Are you a Leaders dealer, or this knowledge came up through years of experience?

I can add to your post few of my points. For a uwh fin there are several important factors, that need to come together in the right ammounts to make best fin for uwh. And even the uwh hockey fin is not one, but two diferent types of fins. So the two most important factors are:
1. Manuverabillity
2. End speed
These two are broken down into several more, and added with other factors
3. 0 acceleration
4. Turning speed
5. Player safety
6. Resistance to tear and mechanical pressures
7. Foot friendliness
8....your ideas?

Now, you cant have all the factors on 100%, as one is contra-relating to another factor. Compromise needs to be found between all factors in the right ammount. Thats where the job gets hard. Basically, there are 2 different fins for hockey, one is more towards end speed, another more towards manuverabillity (fronts-backs), but the difference is/should be small. Here enters our debate about usabillity of monofin in uwh... as an option of one player dedicated do speed, might be able to check-mate the opponents that needs to wear manuever fins in order to keep-up the game.

The momentarry situation in uwh is as follows. On one side there are our old and beloved alas, with excellant manuverabillity, medium speed, tough, resistant, safe, with good acceleration and nice on the foot. On the other side there are fiber fins with higher speeds, ****ty manuverabillity, bad stabilisation, potentially unsafe and can be (or are) damaged quickly.

Probably the best fin is the one that negotiate the balance between these two sides.

My approach is "russian"one, that is to take something proven to work - e.g. alas, and build on that with strategy of "trial&error". But first I need to build on production and tooling. And even If I make the first test fins on time, I'll not be starting/selling before october, since my diving season starts in a month, and I'll use whatever spare time I have left, to build on tooling and production. In autum I hope I'll come up with something like alas on steroids.
The one thing I'm sure of is... I wont quit! Uwh is kindda like my own baby.