You can use these "feet" to mount the Odroid-HC2 onto a wall, a DIN rail clip or anything else. My primary concern while designing this was to allow the Odroid-HC2 operate in an upright position thus enabling the best all around air flow around the device. If you are running one of these with a 3.5" HDD, you surely know how hot this device can get (and not even considering pushing the Samsung Exynos CPU to its full power).

Screenshots generated using fstl: http://www.mattkeeter.com/projects/fstl

Based on the discussion of some users, some more instructions follow:

To make the Odroid-HC2 mount hold onto a DIN rail I modified a DIN rail mount from:

https://www.thingiverse.com/thing:1110765
Din Rail Mount bySelphbis licensed under the Creative Commons - Attribution license (https://creativecommons.org/licenses/by/4.0).

Then I used some wood screws to attach the mount onto the DIN rails. The DIN mount is also attached but please keep in mind that your DIN rail distance may be different and some tuning of the holes are necessary.

Using 2 screws per one DIN rail mount makes the Odroid-HC2 hold perfectly. It even holds well when the mount is printed from Flexfill TPU 98A (which dampens the HDD vibrations thus making the box silent).

If you have a look at the first picture, you should see, how the thingiverse DIN mount holds on the metal DIN rail and how the Odroid-HC2 holder is mounted on top of it with 2 screws each.

I chose this solution, because I was unsure how the DIN mount will hold/work and also unsure about the distance of the 2 rails (i.e. to have some space to move things a bit). Moreover - in my case the DIN mount was very tight with the DIN rail itself, it was very difficult for me to clamp it on the rail. So first, I put all 4 DIN mounts onto the rails and then just screwed the HC2 onto them.
That made my installation also very gentle (no shocks due to pushing the DIN mount onto the rails) for the HDD inside the Odroid box.

Print instructions

Print from something, which is not brittle and can withstand higher operating temperatures. PETG looks like a good choice as well as CPE, ASA etc. Also Flexfill TPU 98A works well.
I wouldn't recommend using PLA due to temperature reasons described above.

Please make sure to print 2 pieces straight as they are in the STL and 2 pieces mirrored by the X-axis.