sean that's awesome =)

For reference, when titling elements in svg for the SM510 games, it's x.y.z, where:
x = a/b/bs/c: 0/1/2/3
y = segment 1-16: 0-15
z = H1-H4: 0-3

so, for example a2 H1 is 0.1.0

Then, svg2lay can make a MAME compatible layout for it. https://github.com/galibert/svg2lay