Micro Linear Actuator

I was looking for some micro linear actuators for my new project, yes, I found some, but $60 each! Excuse me! So, this is it! About $3 each!

https://youtu.be/pYA-az9BLRI

BOM (100mm without limit switch)
1 x N20 gearbox (3mm D shaft length 5mm)
1 x M4 locknut
1 x M4 x 115mm screw (threaded rod)
1 x M4 Square nut
1 x 694ZZ Bearing
threadlocker
8 x M3x10 screws