Yeah, I went ahead and included all SVG's to the romsets. bzaxxon is a special case, Sarayan is working on it.

I'm hoping we can change this:
/* video hardware */
MCFG_SCREEN_SVG_ADD("screen", "svg")
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_SIZE(2033, 713)
MCFG_SCREEN_VISIBLE_AREA(0, 2033-1, 0, 713-1)
MCFG_DEFAULT_LAYOUT(layout_svg)

to something like:
/* video hardware */
MCFG_SCREEN_SVG_ADD("screen", "svg")
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_ASPECT_RATIO(2.85)
MCFG_DEFAULT_LAYOUT(layout_svg)

Where the MAME core maximizes the screen size based on host screen size.