My biggest print so far on the 3L is this 10-disk 3.5" hard drive holder for a Phanteks Enthoo Primo case, in Rigid 4000.
It spans nearly the full length of the build platform, but is narrow enough that I was able to wash half of it at a time in my Form Wash. Cured it on a rotating table in the sun. Here it is installed in the case:
I made some vibration dampening washers out of elastic resin on a Form 3:
The washers were printed directly on the platform. Because of base compression, the hole radius is slightly smaller on one side. That became a design feature, as the resultant thin flange provides a grip against the screw, keeping it from falling out during installation. (You can buy off-the-shelf anti-vibration grommets which extend all the way through the mounting hole, but I didn’t want to wait on parts and wanted to keep things simple).
Here’s the rack with drives installed:
The crack on the bottom right corner was my fault (tried to use a punch that was a little to fat to mark the screw location). I was going to reprint it, but it turned out it’s solid enough without that screw so I just sanded the corner smooth.
I created it because I couldn’t find any existing hard disk racks with enough density, or where drives get inserted sideways instead of from the front. A bonus 11th drive hangs off the right side, and the gap underneath fits two 140mm or three 120mm fans.
I shared the model on GrabCAD for anyone else who wants to fill this case up with HDD’s.