Please add the ability to modify attribute pwm-min-duty in the Tool Configuration page when the tool-type attribute = Laser (J Tech, etc). I haven’t needed pwm-max-duty yet but you might as well throw that in while you are at it.
I was having trouble with corners not burning while using Scratch Paper. I found this media has a very narrow power band (28-32% @ 100ipm) and the corners do not burn with the default settings for “Laser”. I solved it by using tool-type=PWM Spindle and setting the min-pwm-duty to 9%. The photo below shows my results.