Actually, Aaron Giles just did a lot of changes to the DCS core, which haven't been included in the latest release of MAME (so they're not in MAMEoX either), don't know if they'll make things faster or slower, but it could help out speed. If XPort continues work on MAMEoX, then who knows. Great job XPort, you never cease to amaze any of us. Thanks for all your work!