That looks good.
I assume you are also going to make a Mametrix marquee as well. Please consider this idea as I've had it for a long time but am not a large enought fan of the Matrix to make my own. You can get some 10 LED chaser boards and place them behind the marquee. You would need 10 or more to make it cool looking. Make the artwork so that some of the columns of symbols line up with each LED so it looks like they are moving down the marquee as the chasers light up. You can also adjust the speeds of the lights with the kits so it would look super super cool.
To make it even better. Blackout all but the Mametrix logo and the columns you want to light on the backside of the marquee . Then place the LEDs, then mask over the LED sets so that only the LED lights show in the columns. Then when you put your fluorescent lighting in the back just the logo lights up. And the letters would look like they are moving down.
Oh yeah, that would be a sweet marquee.