I ---THINK--- I have it sorted.
I had to reverse the order in which I was compressing the data:
i.e.
Do the loop that handles Transparent (skipped) pixels FIRST, rather than second.

(Replaced SPW-60Bs in Icon0128.shp, slot 4948)
So now I need to archive this version as a known "ok" version and start refining it more and testing it more before I release another version.
I grabbed the old USA REMOD files from here
https://forum.shrapnelgames.com/show...t=49329&page=4
went in; loaded the SHP files in one of gooseman's last uploads; selected one of the weird turreted bradley things and chose to export it (see attached zip for exported version)
Chose to replace the SPW-60B icon using that exported zip file; it automagically replaced the files, enlarged the canvas, and set all the SP Header data from the CSV in the zip.
End result:
