Picky -…-?!
Lets name the problem we have here:
Just imagine walking or running up the staircase.
a)If you simply take one step after the other - you´re on the safe side but rather slow.
b) Going faster, you still can be safe and under complete control when taking two steps at a time throughout the whole staircase.
c) Coming in really fast, you could take the first four or five steps with a jump, but then you need to slow down -
and probably can carry on with two steps at a time.
d) Trying to take - lets say - all ten or twelfe steps at once with a huge jump and you may end up bleeding without any teeth left in your mouth -…-
Thats just an imaginable example for our problem.
Actually I´m talking about the huge amount of knowledge, experience and (proofen) datas regarding wingsails collected over the decades.
- If you want to learn and understand all of it, it will take you several years and a master degree on aerodynamics.
- Trying to achieve all of it in one big sweep, you may end up - no, not with broken teeth - but possibly/probably at least with a broken wing.
- Conclusion:
In order NOT to need several years, unfortunately you GOT TO leave out several steps while moving ahead. - The only question here is, WHICH steps you can leave out safely.
- Furthermore:
Who´s advise or what advise you can trust (to keep your teeth).
So it simply could be “helpful” to question the source of informations.
I´m just a simple 50 year old retired shipwright with 33 years of boat - and yacht-building experience.
(I started my apprenticeship at 17.)
I´m aware of the steps I had to leave out over the years.
Some of them have been a pain for me - or still are.
And lots of so-called “good advise” from so-called “experts” leaded me to dead ends -
where I had to go back and start again from the beginning.
Loosing lots of time, money and energy -…- got me? 
So I´m really seriously concerned if I ask:
“Can you TRUST those sources
or - can you trust those informations?”
“Or - are these datas up-to-date?”
So - please don´t call me picky.
I just don´t want to see you (or anybody) bleeding in any way.
And as a conclusion of all the datas I currently have,
I decided to build a 2 meter rc-model of the 45ft. AC training catamaran
with a 2.8m high solid wing according to the rules of the 2M multihul class.
I wouldn´t invest my time in a monohulled keelboat with a wingmast.
But that´s just my 5 cents.