A parametric desing of a harddisk -tray for 3.5" harddisks. You can use it to design your own hdd-enclosures or hdd-racks.The air-holes are large and deep enough that you should be able to take the tray out without an additional gripYou can use the holes in the bottom or the side to mount it. As you wish.If you feel like it, please add mounting-holes for a ventilator.Update: Made it easier to print.PRT-file can be edited with the free Alibre Design express or 30 the full day trial. (e.g. to change the tracks and outher size to match an existing hdd-rack)