tirrorex
Awesome, just to be sure it is this kit ? :https: //www.alzashop.com/evga-cooler-hybrid-de-l39eau-all-in-one-pour-gtx-1070-1080-d4426990.htm?&language=fr&kampan=adeu_fr-pla-components_high_c_9056543_EV299a1&gclid=CjwKEAjwzKPGBRCS55Oe46q9hCkSJAAMvVuMH_PlAxwP2vVjjy4CllMbsfzw6lfdKA8r8UbfJ_nvRRoCTjXw_wcB ordering right away :D

 Yes that is the correct kit

Here is a picture of the heatsink. The heat sink is not smooth so without a thermal interface between the pcb plate and the heat sink the thermal transfer would be minimal at best. They even put a sticker on the heatsink near the vrm. The heatsink is designed to cool the GPU only in this case.

 
The original plastic window can still be screwed on to the shroud from the exterior instead of the interior. the screw holes are bi directional.
I haven't tried it since im on my way to work, but it minimize escaping air as the air will follow the path of least resistance. 
 
 

If you're comfortable with a dremel tool, you can also install it the "normal" way by making room for the additional 6-pin connector, R22 chip, and the furthest two capacitors.  I did that today on two different 1080 Tis in about 4 hours.  I like the clean look of the install and fully loaded in TimeSpy benchmark, I get top 55 degrees.

One additional tip, if you want a color instead of the white LED on the cover plate, you can slip transparent film between the LED and the name plate.  I went with Blue.

How's the ease of installation? Just simple screwdriver work and disassemble/assemble or some more kludging required? Also, any diff between EVGA 1080ti FE vs the stock Nvidia 1080ti FE? I want to slap this on my Nvidia 1080ti FE, but haven't tried custom gpu hybrid cooling before.

So did the new hybrid shroud not fit at all? it should be taller than the FE shroud. 

IchiTsuyoi
How's the ease of installation? Just simple screwdriver work and disassemble/assemble or some more kludging required? Also, any diff between EVGA 1080ti FE vs the stock Nvidia 1080ti FE? I want to slap this on my Nvidia 1080ti FE, but haven't tried custom gpu hybrid cooling before.

All founders 1080 ti's are the same. And yes what i did was remove and replace screws. I also had to apply thermal paste as I was using a used cooler. 
 
Installation is easy and takes minutes to do. I took about 20 mins

schmak01
So did the new hybrid shroud not fit at all? it should be taller than the FE shroud. 

The hybrid shroud does not fit the reference plate nor does the hybrid plate fit the 1080ti pcb without modification. See post above from bobsuess if you want to go that route of cutting your hybrid plate to fit pcb

Gamers nexus on YouTube release his video of adding hybrid cooler to 1080ti. 
youtube/TX0nQdCRE9Q

Nice! How many Rads do you have in the GPU cooling loop -- only 1.120 push/pull?