AnyCubic I3 Mega Fan support

If you replace the original drivers, you could have problems with the fan because the airflow does not reach all drivers correctly.

It’s possible that the new heatsinks may be higher than the older in this case the fan will be in a forced position avoiding the enclosure doesn't close properly.

Or you just don't want such a loud fan.
In this case, change the original fan for a big (100x100x12mm), slow (1000 RPM) and quiet (14.5dB) fan like Scythe KAZE-JYU slim SY1012SL12L 12V
To install the new Fan, you need print a new support piece/s, and there are two options:
1) One support piece (A) like original support, the fan will be fix with 2 screws.
2) Two supports pieces (A, B and C), now the fan will be fix with 4 screws.
The first option is easy and fast but the second is more robust, better and more complicated.

The files are for Trigorilla 8-bit (The drivers are not soldered)
Fan_Support_A.stl
Fan_Support_B.stl
Fan_Support_C.stl

For more information, see the detail