Pull up bar safety blocks

Mechanism designed for doorway pull up bars, so they can be installed safely anywhere. USE AT YOUR OWN RISK!!! I have been using it for 4 years almost every day without any problem and max weight that has been loaded on is was 120kg (264,5lbs).Use rubber pads between blocks and walls, so the walls are not damaged and mainly so the block doesnt slip. Recomended fasteners:8x Screw M8x110mm16x Washer M88x Selflocking nut M8Rubber pad 10mm thick Video where I explain how it works:https://m.youtube.com/watch?v=GJudkLVpV90&t=8s&pp=ygULZ3JpZmlkZXNpZ24%3D Material: PETGLayer height 0,28mmInfill: 70% Print: 2x Block 12x Block 28x Arm Print blocks with screw holes facing up form print bed.