a HDD Cage for 3 HDD's with possibility to mount a fan for cooling:

You need cylinder head screws for mounting the HDD's on the rail and for mounting fan.

Place the HDD with rail in position then fix it with the "Pöbbel.stl".

So you can change various HDD's quickly without screwdriver.

You can use my calculation tool to see if the speed set in your printer config is reached.

https://www.warp-factory.de/3dprinterspeed.php