Z-axis with one motor for anycubic i3+

I've tied to keep X-axis parallel to bad and do levelling before each printing.
So I decided to remove one motor.

Videos:
https://youtu.be/aJEpPoFg_QU
https://youtu.be/hRVbY9G7JPs

You will need to have:
4 M3x10 bolts for a stepper
12 M3X20 bolts
2 M3X25 bolts
14 M3 nuts
8 M3 washers
4 608zz bearings
2 GT2-6 D8 cogged pulley
1 GT2-6 D5 cogged pulley
2 GT2-6 D5 (or D3 if you will find them) rollers for cogged strap
1 annular strap (852mm at minimum but it will be better