I've changed most of fans in my Ender3 s1 to noctua. Since they need a stepdown I've designed this case mounted on a 3printer.

Rails are a bit of a thight fit, but at least they don't move when you carry your printer.

To mount the board to the case ive used m253.2 mm threded inserts and screws.

Creality

Ender 3

Doesn't Matter

Yes

1.6

45

Do not use PETG or anything other than PLA/PLA+ (the hindge will fuse togeter during printing).