The new Phrozen T-Plate Upgrade Kit has been released to compensate the design error of the Phrozen Sonic Mini 4K!
The upgrade kit strengthens the Z-axis structure of Sonic Mini 4K to achieve higher strength and improve the quality of the printing result. With a stepper motor/T-bolt set and a linear slide that offers better linearity, the four-point fixed aluminum alloy T-plate increases the strength of the mechanism, so you can print large objects more stably and even better.
Can be purchased for 50€ at 3D Jake, instructions available on the net. Here is the link: https://www.3djake.de/phrozen/t-plate-upgrade-kit