I was going to mount a monitor up high in my workshop, where a completely straight mount would mean a weird viewing angle, as well as showing a reflection of the roof lights.
As such I changed the original wall mount to have a 20 degree wedge underneath it, so that the monitor would then sit with a 20 degree downslope (or upslope if you used it up side down, I guess). I changed the mounting holes so that they remain square to the wall.
Given the increased thickness of the wall mount, I also uprated the mounting holes to use stronger screws - the ones I had on hand, and designed for, are 14g (~6mm) x 75mm hex head timber screws like these (https://www.bunnings.com.au/zenith-14g-x-75mm-galvanised-hex-head-type-17-timber-screws-5-pack_p2420369)
The tall screw hole is 43mm deep (hence the need for a 75mm screw), the shorter one is 22mm deep and a 50mm screw would be a less overkill/more appropriate choice.
EDIT make sure you mirror one of the two mounts you print, so you have a left hand and right hand side to the wedge.