For a full and complete comparison, here's the result I was able to get with a very quick and basic attempt using 'my' method as described in full steps above... No nasty side-effects here.

Detail of the same critical area at 100%.

We do not see things as they are. ǝɹɐ ǝʍ sɐ sƃuıɥʇ ǝǝs ǝʍ