Hi Guys,
Find attached to this post the STLs and the build instructions for the T-wist Beta 3.
To build this you will require a Parallax Feedback 360° Servo (900-00360). If you are unable to find one and you still want to build a T-wist I suggest that you look up previous versions of the design, which use a regular continuous rotation servo and a potentiometer to track position.
(Sadly due to an ongoing security flaw in Patreon I have had to password protect the files again. As $8 patrons you should have received the password from me separately. If you have trouble getting access feel free to contact me, or for unprotected files you can check out the #maker-design-vault on my Discord server, which as my patrons you are entitled to access.)