Because of the rediculously small back window of the Astro, it seems impossible to reach these controls fom outside the cabinet, without removing the screen. Still, the screen needs to be connected if I'm going to be able to tell what's happening when turning the pots. I've never actually tried to lift the screen off (problems with one of the nuts, fixed now), so I have no idea what nightmarish experience I could possibly have to go through.
Please share what to keep in mind when messing with the screen controls on the Astro City chassi board. Are the cables / cords even long enough for the screen to be outside of the cabinet?

Thanks!