I needed a 90 degree bracket to secure a part of a montessori bed my son is sleeping on. The width of the wooden plank used on the bed is 20mm. I secured it with 4mm bolts

Douk Audio BS-1 Bass Shaker Sim Rig Mount. I designed this one to be able to mount correctly even if you sim rig sits really low to the ground. As long as you have 10mm clearance under the profile you should be good. I had a plan to print it in PETG but my PLA tests were rigid enough. Maybe this shouldn't be too rigid so it transfers more vibrations to the sim rig. What you need to mount it onto your 8040 rig 4 x M8 t nuts 4 x M8 20mm bolts 4 x M4 x 20mm bolts 4 x M4 washers and nuts