adjusted this line. finally figured it out

aspect_ratio_index = 6

figured out that i need all retroarch emulators to be displayed in 3:2 aspect ratio. now to figure out how to get them all in that without having to create a custom config for each emulator.

Here are examples, the only one that truly outputs to fullscreen is GBA

http://imgur.com/a/4n2gW

Also here are the contents of my boot/config.txt and recalbox.conf

config.txt = http://pastebin.com/6jCPaged

recalbox.conf = http://pastebin.com/Zie8EjbL

Thanks again.

OK... here goes...

I am running recalbox on a RPI3 with composite out connected to a 13" tube television. Most emulators have black bars on the sides only. Is there a way to stretch these emulators so that they fill the screen entirely like they did on the original consoles?

I have adjusted the overscan values to get emulationstation to fill the screen correctly, hoping that this would make the emulators follow suit, but no dice.

Any help is greatly appreciated.
Thanks