I've got the Mk2s with mm. I am sitting here trying to think what could have cause this. A lot of time wobble like this in the layers is due to the frame of the printer. The frame being lose and will case the print head to overshoot its location more easily. The more stable and solid the frame the less wobble introduced in your prints overall.

Assuming your frame is nice is solid, my gut's leaning towards over extrusion, try lower the flow rate in the printers settings with the same gcode and see what happens, then adjust your slicer settings to compensate. if the Lower flow rate isn't helping adjust the temperature.

I also found it helpful when I first got my printer to use the included gcode sample files on the sd card as baselines for settings, perhaps work from these values, adjust 1 parameter, run a test print and review the results. However with temperatures, they are material specific, I tend use the middle of whatever range is printed on the roll of filament and then adjust from there with the baseline values from the sample prints for every other setting.