This is v2 of my wall mount, as of yet unprinted in it's current form. However, I printed two of v1 on my XYZ DaVinci without issue (no support). The only real difference between this project (v2) and the pictures shown (v1) is that the wall mounting plate was extended so it can be installed after the two pieces are fused together and the arm coming out was slightly shortened.

EDIT: I finally got around to getting some new pics of the v2 and removed the old pics. The top one is the v2 while the bottom two are my trial print v1. The other holders in the one pic (for Xbox One and Wii U) are test prints and need some tweaking before I finalize them, in case people were wondering.

After printing, some cleanup/sanding may be necessary to get the post in the hole. After getting a good fit, glue or fuse (with acetone for ABS) to make sure it's secure.

Made using zhoujianfu's Xbox 360 Controller scan.