I built the most expensive Longer LK4 Pro printer - linear XYZ rails, direct drive, dual Z upgrade

I decided to upgrade my printer and try to make it more in line with all new model out these days. I added linear rails on all axis, upgraded to direct drive and slapped in a second Z stepper motor. Tried to keep cost down so all parts were ordered from Aliexpress, the rest is printed.

Total cost of upgrade was little shy of 200EUR, not ideal price but outcome is pretty satisfactory - an obsolete printer brought in to modern times. Next logical update to it would be slapping a Klipper board.

BOM and 3D parts here: https://www.thingiverse.com/thing:665...

Follow for more:
http://www.diy-sim.com
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If you like my work you can always buy me a beer here: https://paypal.me/StuyoDGr8

Timeline:
00:00 - Intro
03:45 - Pt. 1: Y-Axis
05:36 - Pt. 2: Gantry Removal
08:18 - Pt. 3: Z-Axis
13:05 - Pt. 4: X-Axis
17:28 - Pt. 5: Toolhead
22:07 - Pt. 6: Y-Axis Revisited
28:08 - Pt. 7: Other Upgrades
32:13 - Pt. 8: Prints
34:05 - Pt. 9: Conclusion