I read your blog. Very interesting....This concerns me somewhat:
The tree (unless there's already a point of weakness) is not likely to break/crack after one ride. It's something that happens over time. Should you consider putting these ultra-wide gullets into any wintec other than the one they were designed for, you lose any kind of warranty that may exist on the tree. On average, the trees are under warranty for 5 to 10 years, depending on the make and model.
As a saddle fitter and employee of an authorized Wintec dealer, I must advise strongly against this. I'm honestly not trying to be rude or mean, so I apologize if my post comes across that way.
Not at all!
I figured there would be about an even split between "hey, cool!" and "you should NOT do that!".
I was extremely interested to find that it was far more physically difficult and required much more force to install the black medium gullet in the Wintec 500 AP for the "before" photo than it did to install the light purple xx-wide. The 500 has had the red wide gullet installed for years, and that makes me wonder if the Wintec trees have "memory", I.e., if you use the white extra-wide gullet on a saddle for a long time, is it harder to install a narrow gullet than it would have been straight from the factory.
Essentially, if it had been physically difficult to fit the xx-wide gullet, I wouldn't have pursued it. However, it wasn't-- it popped right into two different models with a minimum of force.
Honestly, though, I wish Wintec would just stop dragging their feet on a Wintec Wide dressage model, and save us all the grief.