Seems like there's enough room to use regular thickness fans in there?! Looking nice!!
I guess one could technically fit full 60x25mm fan for the GPU (very tight fit), but in my case, it doesn't make sense, as it just interferes with my RX 6400 fan.
If using some like Robee's A2000 deshroud mod, it would be just nice I reckon.
As for the front three fans, I think 8015mm would be just the right size/clearance for cables/wiring. I mean, full sized fans might fit though.