Is it safe to use photon-resin-calibration for Epax printer? This repository contains a calibration test for DLP printers.

As its file Instructions.txt says, it is an ANYCUBIC RESIN EXPOSURE FINDER by X3msnake.

Are all the files, both .photon and .gcode, compatible with the Epax X1 printer?
Yes, it seems to be.

I tried the test and it worked well.