Created and already ordered pcb's for 7-segment display on soviet indicators IV-6. I made one 100x100mm board(5$ x 10pcs on easyeda) with 6 digits, but I'll make 10 boards - 5 boards per line, 

so I will have 30x2 digit display.

Would be used for showing current states of all registers - IR, AR, TR, CMD_R and for instruction retired and cycles count.

3D render is here, dynamic indication, K155TM8 4xD-triggers for anodes and cathodes, atmega168 as controller.