Haha that cool Mr Burrows, always love your tool solutions :-)
obviously something off throw it that far out, from standard setting it about 1.25deg out .
worth checking lateral links hub, strut and top hat. you can gain some by slop in top hat fitting and strut to hub, with BC strut got be curious how accurate jigged so worth comparing all OS to NS for measures .
camber bolts or adjustable top mounts handy for precise adjustment but suspension wants good check be sure nothing out of spec. Done a supra once with similar camber issue and was top hub mount bent just fractionally from curbing impact probably, not visible by eye looking at hub but rule spotted it .