Z-axis belt synchronize Flsun G

This is a upgrade to the Flsun G printer. My printer was a pre-sale version, but I think its the same on all G's.
With the belt you no longer have to level you bed every time you start a print.
The 2 z axis's stay synchronized.

You have to modify the parts you buy - so you will need to use a lathe.
The coupler need to go inside the timing pulley to get a hold on the motor shaft.
Update - please check drawing coupler_pulley.pdf.

I also ad an improved rod mount. They are a replacement