Anycubic Kossel Trigorilla mount inspired by https://www.thingiverse.com/thing:2747843
This allows mounting the Trigorilla board lower inside the frame of the Anycubic Kossel, which creates a bit more clearance when installing stepper drivers that require active fan cooling (TMC2208 in my case). It also makes cable management a bit easier.
The support pieces mount to the opposite sides of the frame, and make the assembly more solid.
Since the USB cable is difficult to plug into the board with it sitting lower inside the frame, i used a 90 degree extension cable with a panel mount female connector and printed a mounting panel for it. Moving the LCD over a bit created enough room to mount the panel next to it.
Since the board mount sits about flush with the bottom edge of the frame, i would recommend adding some feet to the corners to rise the machine up a bit.
I'm using this cooling tunnel and a 5015 fan for cooling the stepper drivers: