Today, I started drilling the holes for the Leds to fit. I made the matix 4x5 (20 leds), They will all be red and will flash in this seq:
Center line - 2 lines out - 2 lines on the outter edge horizontal. The large hole is for the power plug and there will posibly be a green and red led in the top right corner.
The leds fit the holes perfect and the thinkness of the aluminum is correct for the leds to stick out very little. This gives me a flush design.
The electronics to do the flashing, I'm not sure what I'll use. Maybe a Carl's board can handle this seq. Now to sand, prime and install this project.