I recently purchased a M350 Universal Mini-ITX enclosure to hold a compact workstation for 3D rendering purposes. As I am tight for space, the case had to be as small as possible and preferably mount to my 19' widescreen monitor. The M350 seemed to fit the bill, but it was only after I purchased it that I thought to check the mounting holes on my monitor... Doh, there is more than one VESA standard and my monitor and case did not match.So I have created a printable adaptor that is as parametric as I can make it. As well as having variables for the key attributes you may need to change such as mounting hole sizes and the height of the adaptor, their are also 3 different styles of mounting plate you can generate using the scad file.Cross. The mounts are held in place by two crossed beamsOuter Ring. The mounts are contained within a ring which has optional oval cut-outsThere is also an option to switch between generating the mounting plate and a much smaller calibration piece.Although designed to mount an ITX case to a VESA75 equiped monitor, I am sure that this design can be used for other purposes as well. Hence the amount of adjustment possible via Openscad. I printed mine in PLA and it seems strong enough to hold my ITX case and electronics. Download the scad file and open in OpenScad.Change the test_piece variable to true to allow you to calibrate the piece.Set your variables to whatever sizes you think work best on your own printer. Export the test piece as an STL and try printing it. The test piece is one corner of the mounting adaptor, you can test fit it to the monitor that you are going to be using. If you are happy with the test piece go back to Openscad and set test_piece=false.Now choose set the options that you want for the adaptor. As well as changing the style of the adaptor you can tweak other variables to make the adaptor stronger or lighter. I have tried to comment everything as clearly as possible. If in doubt, try changing things a bit and see the effect it has on the adaptor.You can also decide what kind of mounting holes that you would like for both the 75mm spaced and 100mm spaced holes independently of each other. There are options for either a trapped nut or a recessed screw and washer. Note that the size of the mounts is adjusted by both the m4_washer_diameter and mount_chunkiness variables so even if you are using trapped nut mounting holes throughout, you will probably still need to play with this variable.Available Variables test_piece vesa_75_nut vesa_100_nut outer_ring_option center_piece_option outer_ring_cutouts_option plate_height m4_thread_diameter m4_nut_diameter m4_washer_diameter m4_head_depth mount_chunkiness cutout_width cutout_length cutout_gapPrint with your preferred settings. I printed mine with 3 outer layers and 35% infill. This seems dureable enough with my ITX case YMMV.Insert the nuts and bolts that you wish and attach the devices that you wish to use with the adaptor.