I made another build with the BD790i in the InWin Chopin Max.

The NF-A12x15 fan just clear the back of the case. I had to remove the corner pads in the end. I use the both fan bracket, the one on the back help to have the fan stable. With the back bracket screwed down, it makes accessing anything more difficult since the fan is in the way.

I still think a mounting option for a 92mm fan would help a lot. While the estimated air flow was similar, the additional static pressure of the 92mm help push air out more. I did try the NF-A9 PWM, the case did close but the panel mesh was being pushed out. Thinner 92mm bracket may work.

The Chopin MAX has a very clean look.

I think the 92mm bracket exist as seen here in the MINISFORUM 790S7. Need to ask if they would sell those as accessory.