This sounds really harsh:

Just for the record the only other person who is qualified to answer the questions in this post on the YFZ clip's aside from Me n Al would be Mike Steiner. He used a oem frame section on his hybrid while I was redesigning the front half. We never did compare notes as to why.

 Everyone else is doing it because they heard it works.

There are other front ends out there on LT's, some work good. I have helped a couple of guys with stuff they picked up and cannot identify to get there setups working correctly.

The LTR YFZ and any version TRX are not Ideal either all need tweaking to get them the best they can be. The major limiting Factor is the ball joints they us on tie rods and spindles they have limited angular movement in there ideal safe ranges.  Here's the trade off ball joints and Heims are inexpensive to use and easy to get, so there readily accepted by the General Public. 

My suggestion IF YOU REALLY WANT   the absolute best front end money can buy FIND a Laeger T pin protrax and work from there.
 
Its the only real long travel setup available, bear in mind they were designed around oem frames so there are some limitations. You will not get a setup that can handle more travel than one of these due specifically to the spindle design. The Arms mounting configuration is the Sole reason travel limited. 

Diablo I believe has a unique front end on his machine, designed for maximum ball joint travel. I think if you look hard enough I believe you would find Dean Sundahl may have built it for a customer, If not him then a Buggy company did it.

Read this in no way as I am the EXPERT ON suspension designs. There are plenty of smarter people than I. It just happens I did a lot of home work and research for MY YFZ setup and settled on what I believed most people would actually buy. At that point Al an I went to work and the results were very good, I am extremely happy with how they handle.