I remixed this design for a bed mounted camera stand I found that the original design by papinist would occasionally catch on the frame and make the belts skip some steps making the print fail.
I added a bit of an angle to the mount so it shouldnt catch any more.
I would print with supports just to give it a bit of help sticking to the bed. The angle the stl is printed at could easily lever itself off the bed
Included a STP file so you can remix away