UPDATE: I bought an Dyson V12 and discovered that they changed the interface. I made a version that fits the newer accessories with the wedged interface, too.
The mounts are angled, so all varios Dyson Accessories can be mounted without interfering with the wall. You can combine several rails by a dogbone joint. I use to rails that are joint and hold by two screws on the wall.
The mount can be printed with supports, but then the fit to the rail could be hard to achieve. Instead you can print a support in a dissimilar material before hand (my wall mount is printed in PETG and I used PLA as support material, so it doesn't stick that much). The support is than put into the print before the bridging is done by pausing the print:

The author marked this model as their own original creation.