VESA 100 flush wall mount for drywall

This is a VESA 100mm flush wall mount for tv/monitor. I made 2 styles :

*Type A : Requires only a hole in the wall, it has a 'hook' system.
*Type B : Requires 8 screws to fix it in the wall, plus anchors or pieces of wood. It's usefull if you have something behind the wall wich prevents you to use the hook system.
You need to print :

• 4x monitor pins
• 1x plate (Type A or Type B)

• For the type A plate only, you'll need 4 hooks too
  You need these mounting hardware parts :

• 4x M4x16mm countersunk screws to mount the pins at the back of the monitor

• (Type A) 4x M4x16mm countersunk screws and 4x M4 nuts

• (Type B) 9x screws (with drywall anchors, or a piece of wood behind the wall, as you want)
  Instructions :

• Make a hole 133,00 mm x 139,50 mm in the drywall (about 5 1/4" x 5 1/2")

• Fix the plate in it with the 4 hooks + screws + nuts (Type A) or with the 8 screws (Type B)
• Screw the 4 pins to the back of the monitor
• Hang your monitor/tv on the wall plate