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That's not it then... apart from a small difference in the artpath my config matches that.

Forgot to add, Star Trek is now only filling 1/3 of my 25" crt, right in the middle, if i play with video options i can get full screen but its not saving the changes.  didnt do this before update to latest version 5.2.7. sounds pretty much like star wars, still kinda fast but muffled/distorted sounding. I can try different mame version on it but I'm limited to star wars because of  the new controller fix you made. Both roms are in .274

I'm now thinking the issue you're having with Star Trek is the widthfix command running too soon, having loaded the game multiple times I've seen it time right and also not...  I may make the timing game specific or just add a second of extra delay for all games...  more testing required.  (also it turns out I don't have zoom to screen area activated for Star Trek, I'm just not using the bezel art...

Digging further into vector game speed, I'm not sure how to get them running at the right speed without the audio distortion due to the weird refresh rates many vector games used.  My best idea at the moment (short of finding the magic MAME setting that fixes it) is to add a 50hz interlaced mode (which should be an improvement but wont be perfect for Star Wars either).

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Copied from https://forum.arcadecontrols.com/index.php?topic=121372.0
Vector games (parent sets only):

13 horizontal @ 38Hz - armora, boxingb, demon, qb3, ripoff, solarq, spacewar, speedfrk, starcas, starhawk, tailg, warrior, wotw
12 horizontal @ 40Hz - aztarac, bradley, bzone, elim2, esb, llander, omegrace, spacfury, startrek, starwars, tomcat, zektor
1 horizontal @ 45Hz - spacduel
1 horizontal @ 50Hz - mhavoc
6 horizontal @ 60Hz - astdelux, asteroid, bwidow, gravitar, redbaron, topgunnr

2 vertical @ 38Hz - barrier, sundance
2 vertical @ 40Hz - cchasm, tacscan
3 vertical @ 60Hz - quantum, raaspec, tempest

its not saving the changes. [section removed] in .274

Turns out 274 doesn't save all changes.  Messing with the sliders, contrast saves, beam width doesn't... no idea why.  It's possible some settings get overrided by some other settings, not sure at the moment.  Maybe MAME only saves some of the slider settings(?)... not sure why that would be the case either.

Also, I need to add some monitor rotation handling for the vector games.

The render change looks good, however the voices on Star Wars sound off now, like muffled sounding and almost like a little slow motion. Star Trek seems the same but not as bad as Star Wars.

I checked the older builds while I was adding FBNeo to 3.11 and found a MAME setting that we wern't using, just maybe it's the one.  If you'd like to try it in the mame274.sh launcher find

else
## not rotated game
    if [ $screen == vector ]; then

and change the next line to:

aconfig="-throttle -nosyncrefresh -nowaitvsync -ka -unevenstretch -uifont uismall.bdf -aspect 5:1"

This is whats there currently:

## not rotated game
    if [ $screen == vector ]; then
#        aconfig="-syncrefresh -throttle -intscaley 1 -unevenstretchx -uifont uismall.bdf -aspect 4:3"
        aconfig="-syncrefresh -throttle -ka -unevenstretch -uifont uismall.bdf -aspect 5:1"
    else
            if [ $1 == spacefb ] || [ "$r" -gt 61.00 ];then
        aconfig="-intscaley 1 -unevenstretchx -uifont uismall.bdf -throttle -nowaitvsync -nosyncrefresh -refreshspeed -aspect 4:3"
        else
        aconfig="-intscaley 1 -unevenstretchx -uifont uismall.bdf -waitvsync -aspect 4:3"
        fi
    fi
fi

try making it:

## not rotated game
    if [ $screen == vector ]; then
        aconfig="-throttle -nosyncrefresh -nowaitvsync -ka -unevenstretch -uifont uismall.bdf -aspect 5:1"
    else
        if [ $1 == spacefb ] || [ "$r" -gt 61.00 ];then
            aconfig="-intscaley 1 -unevenstretchx -uifont uismall.bdf -throttle -nowaitvsync -nosyncrefresh -refreshspeed -aspect 4:3"
        else
            aconfig="-intscaley 1 -unevenstretchx -uifont uismall.bdf -waitvsync -aspect 4:3"
        fi
    fi
fi

That didnt work. However, I tried moving Star Trek to 172 using correct ROM and what I noticed is when you push TAB and select ABOUT MAME at the very top of menu it says something about MAME 0.269. It is the same for 274, say 269 when selecting ABOUT MAME. Did not check 251 and totally different menu for 279 ROMs. Star Wars seems OK and very playable in 274 with speed and voices not being too fast.

Verified a couple things with what you told me to try (correct spelling, wording, etc) Still doing above.

I need to look into the about MAME version thing.  No idea whats going on there, I'll look into it in the next few days.

I can duplicate the vector render mod in the 274 launcher to another MAME if any particular games are better elsewhere.