Okay, here's some of the machines I've done DMD extenders on.

Never mind all my pictures look like I was drunk when I took them; I wasnt!

On most of the games I was trying to color match the speaker panel and or playfield.

Every single LCD screen I used seemed to have different color/brightness. Despite being the same model number. Your results will vary.

The Shadow.
Shadow1.jpgShadow2.jpgShadow-config.jpg

Johnny Mnemonic.
JM.jpgjm2.jpgjm-config.jpg

Demolition Man.
DM1.jpgDM2.jpgDM-config.jpg

Stargate.
Stargate1.jpgStargate2.jpgstargate-config.jpg

World Cup Soccer 94.
WCS941.jpgWCS942.jpgWCS94-config.jpg

Fun stuff!!

This is a great feature and one I've been happy to test when doing colors on Gladiators and Stargate. The program does pause waiting for the card to be reinserted. It freezes the screen when waiting. And when you insert the card again it reboots the pi to reload the new colors/settings.

Whitewater is looking nice. Very nice color choices!

Sonic looks like he's on some good acid.

I've purchased several of these:

190900586794
ebay.com link: itm

Usually it takes 7 days to receive it. Ask and see if that controller will work for your screen. I'm betting it will.

That cat cracks me up!!

I couldnt find a good tap point for power for gottlieb games.

I cheated and took an old external cdrom drives power supply that had +5 and +12 power output,made a connector and plugged it into the power box up front near the coindoor. One of the outlets turns off and on with the game. Works for me. Less strain on the old power supply too!

Yes, on Stargate and Gladiators it does for me. Wipeout too, I believe.

I originally had the PI powered via a custom cable hooked to the DMD power cable, but preffered the separate power supply for both - Less strain on the power supply of the pinball machine.

some of the LED display controllers I've used take a while to boot some are shorter than others. still all about 4 to 6 seconds

I doubt it's a power supply problem.

Freddy looks great in green!

And protected to only run on the sd card provided I believe. (Via the config file)

Wow, that DM palette looks terrible in T2!

The red is nice! Looks good!

I have 2 DMDextender systems I'll be selling as i upgraded the machines to colordmd.

Old style with raspberry pi model a.