This is a striking image, but the colour has me quite puzzled.
A standard SHO palette of this area would not be so orange if you'd mapped the SII to red, H-alpha to green and OIII to blue
....likely more green as I suspect the area is dominated by H-alpha
(see Gleason 2018)
But as a result, that orange palette makes it tricky to see where the SII and Ha regions are in relation to each other. (and I'm not even Catholic
)
Assuming the thin...and quite elegant...shock-front is emitting strongly in OIII then it makes sense that you'd not want to mask that and shift the palette to enhance that contrast. Is that what you intended?