HDD Rail for Medion/Digitainer HTPC case / Schiene 3.5 inch

For my new computer setup, I chose the cheap â‚¬15 Medion/Digitainer HTPC-Case
from Pollin. It's a surprisingly well made case with screw-less drive mount... IF you have the parts, which are not included for a 3.5" Harddrive.

After considering mounting the drive under the DVD burner, but beeing unhappy with the 5.25" to 3.5" adapters I could find, I started one myself. I tried to keep it minimalistic (cheap&fast), but I did not finish it (See SketchUP file: Test_HDD_5-25_3-5_Adapter3.skp).

Instead I decided to create slides for the intended harddrive bay, and after finding some similar one at Google Warehouse that did not work out, I started from sketch.
I somewhat cleaned them up and made them a single manifold object, plus changed it so they can be printed without support material from one side.