Universal ball and socked arm

WORK IN PROGRESS
UPDATES AND ADDITIONAL PARTS COMING

This is a universal ball and socked arm design that aims to be versatile, customizable easy to adapt/ print and sturdy.
The idea is that me and everyone who needs it can easily build a arm and use accessories from either my library other users or simply design new ones. Therefore, I tried to make the entire design with commonly available parts and an easy interface between all parts so everyone can design new accessories.

To connect the parts, you will need Bolts M3 ~20 - ~40

M3 nuts OR square nuts OR hotmelt inserts (M3xD4.6xL5)
https://www.aliexpress.com/item/4000232858343.html?spm=a2g0s.9042311.0.0.27424c4dELIdSE

To interface with existing parts:

Extrusion: 10x10x10mm with 4mm hole and D6mm x h4mm countersink for the head.
1mm chamfers on all edges

Hole: 10.5x10.5x10mm with 4mm hole at the back and facility to insert nut


Assembly

Insert the nuts or hotmelt inserts in the parts. Hotmelt inserts should