2020 extension for the Ender-2

Insertion perfect but the drive belt is unable to pass... lol, remodeling. Also the 2020 model I had is not exactly the same as used for the Ender-2. I used a scanner to get the profile from it. That is way more complicated than I tought.

Oups insertion to big... remodeling.

I think this is the easiest way to extend in one direction the Ender-2. From 15 to 18 cm seems reasonable enough for a first try and probably stable. I will get back to you with tests.