X3S Z axis adjustment

I just don't get why 3D printer designers provide terrible Z axis adjustment. I guess it is so people like me have a mission.

I like the Tronxy X3S pre-built printer except for the lousy Z axis adjustment (also the print bed isn't all that great). I added the MatterHackers magnetic build plate to fix the print bed issue.

Here is my fix for the Z axis adjustment. Use a 5mm x 70mm screw, standard nut and nylock nut. The nylock inserts in the lower bracket and keeps the adjustment locked in.