I just got my machine the couple of weeks ago. I’m trying to tram it. I can figure out how to do the Y axis by shimming the spindle mount. Not sure how to tram the X axis because I don’t know where the adjustments should be made. I tried using the spindle mount for that, and have not been too successful. Where are the adjustment points for the X axis?
From looking at this, I’d try leveling the work surface to the machine. It doesn’t look like you have adjustments, as the screws just go into the extrusion on the side plates. This is just a guess. This machine looks like many Open Build type machines with wheels, plates, and extrusion, and lead screws.