That is why I stated it's hard for me to generate gcodes here and then you test there. We do not except PayPal, but our distributor Darky Labs does. They sell a nice laser diode engraver also that will engrave with varied intensity. More expensive then what you purchased, but allot better system.
https://darklylabs.com/
Our software.
https://darklylabs.com/product-category/software/
The $7 setting is for how strong the driver holds the stepper motor in place when idle. As long as the stepper and driver does not get too hot, a $7=255 setting is fine. That is what we set it at on our Shapeoko 2 with grbl 9g flashed to an Arduino UNO & the gshield V5 stepper driver. It has nema 17 steppers.