Ball and Socket extension bar

An extension bar for a ball-and-socket joint. Created to move the phone closer to the user from the windscreen mount, but it can be used anywhere there's a ball-and-socket joint. It can be resized 120mm to over 180mm and locked into place. Print in ABS or PETG or similar, so it survives inside a car in the summer. You need a 25mm M3 bolt to strengthen the neck; the first print failed very quickly there. The OpenScad source requires the STLs from the Open Source Ball Joint, but since that's an 18mm ball and I needed 20mm, it's resized to suit. The extension bar is sized to match the end-faces of the resized STLs. If you want a longer or shorter bar, alter the connBot/connTop in the source.