Paste extruder Flyingbear tornado

Hi everyone,

This is the paste extruder I designed for flyingbear tornado.
Syringue:
https://www.aliexpress.com/item/150ML-Transparent-Reusable-Large-Big-Plastic-Hydroponics-Nutrient-Measuring-Syringe/32845092700.html?spm=a2g0s.9042311.0.0.dbLT2w
Ball screw:
https://www.aliexpress.com/item/Free-shipping-T8-Lead-screw-300-mm-8mm-brass-copper-nut-KP08-or-KFL08-bearing-Bracket/32596099063.html?spm=a2g0s.9042311.0.0.tIquex
Bearing: extracted from ball screw kit
Linear rail:
https://www.al