Z80 LED Breakout Board UNTESTED!

The concept behind this design is great - provide a Z80 breakout board with access to all of the Z80’s 40 pins, and LEDs showing the state of the Z80’s address, data and control pins. I especially like that the LEDs for the Z80’s inverted control pins are connected (through resistors) to ground, so that those LEDs light when their corresponding Z80 pin’s output is low (active). But the design has a major flaw. I assume one intent of the design was to provide a set of 2 x 20 headers, breaking out each of the Z80’s 40 pins. There is a set of holes to the left of the Z80 DIP socket (U7), labeled J1, that connects to the Z80’s pins 1-20. And another set of holes, unlabeled, that connects to the Z80’s pins 21-40. But that set of holes (highlighted in the photo) is located UNDER the Z80’s DIP socket. That means, if you want to use 2 x 20 pin headers to expose the Z80’s 40 pins, you’ll have to attach the header for pins 21-40 to the BACK of the board. (I ended up attaching both headers to the back of the board.) A better design would be to shift the U7 pins to the left, leaving enough room for the 20-pin J1 header along the left side of the DIP socket, and a 20-pin J2 header along the right side of the DIP socket. That would allow all components, including both headers, to be attached to the top of the board.