reading your posts and looking at your pictures…I feel you are at the same place I was a number of months ago…you are rushing perfection…
what I mean by this is when you do cust and it does not come out right is seems you are changing a whole bunch of setting rather that just adjusting one setting and trying again
you need to take a piece of metal and cut a bunch of 6" lines…side by side…
the for each line you cut…you change one parameter like amps only for about 10 lines…
here is an example…read the thread attached
this is a great example of how to fine tune your cutting.
everyone has slightly different results…metal quality, air quality, electrical supply, consumable condition and quality…all these factor into a cut.