Only in german, but here we´ve written some tips and tricks (and meanings) for the Gigant 3360.
Airplex Gigant Tipps und Tricks
Here are my experiencxes about fan constellations on the Gigant (translated by google):
"If, like me, you plan to mount all 4 fan rails for the 24 fans, you should note the following.
I installed the 4 rails including the 24 fans. Then I wanted to attach the fan cover. Unfortunately it does not work. So it is not possible to operate 2x 180mm and 24x 140mm.
In the maximum case, only the 180 fan at the bottom and the 24 140 fans on the sides. The upper 180 can only be mounted on top, i.e. on the outside of the stainless steel fan grille.
Or you can find a slim fan. I don't know how much space there was anymore. I think it's 1.6cm or so. So if anyone knows a 15mm thick 180mm fan: bring it on
.
But I'll test whether, if all the rails are installed at the top, a 120mm fan, for example, will fit in the middle -