Found this on youtube and might be helpful. Just remember, on the Eagle Talon, raising the seat will compromise the stability of the yak possibly especially at 30" in width. https://www.youtube.com/watch?v=7sVQv-FsPEQ
Exactly! The guy in video mentions that he hasn't paddled the kayak since putting the new raised seat in.. hopefully he has at least experimented with his kayak by sitting on top of something in the original seat that will raise his Center of Gravity to the same height of new seat AND in conditions that aren't ideal. If he hasn't, he could be in for a shocking experience, especially in windy/choppy condtions.
I understand the comfort and wet conditions of sitting so low with original seat... went through the same thing myself. Wouldn't dare put one of those on a 30' beam kayak myself for several reasons.
1. The kayak wasn't designed to have that type seat in it and the plastic in the area that comes in contact with seat frame might give way over time, especially if frame doesn't
sit perfectly flat in all areas that come in contact with kayak... and still it might break through later on depending on your weight.
2. Hard to keep a design like that from shifting either side to side or forwards and backwards when conditions get worse than what you started out in. Sitting in a high chair that is throwing your weight side to side is the worst from a higher position.
3. Anchoring that chair will cause great stress wherever you drill.