Here's mine! It's housed in an unusual Xybots cabinet. I had to bore holes through the metal control panel to add more buttons, which was quite tricky. I was able to acquire an extra control panel so I still have the original in case I want to revert the game back some day since the machine still has the original, working boards inside.
I did something unusual here that I've never seen done before. I added toggles where two of the original fire buttons were to determine which buttons belong to which player / joystick. If you examine my photo, you'll see that both toggles are switched left. So any button player one uses will work! I did this because it felt awkward playing on the left side of the machine with the buttons on the left, looking at the screen at an angle. I made this a long time ago so can't recall why I didn't put them on the right, but I think it had to do with both fitting them into the small panel and symmetrically integrating them into the existing design. Anyway, this allows a single player to be totally centered in the middle of the machine using the left joystick and right button banks. For games that require two players, I just toggle the right switch right.
There's an iPac mounted beneath the middle of the panel. I'm using Ultimarc Mag-Stik Plus 4-8 way switchable from the top of the panel joysticks. I have the coin door buttons lit up with USB LED lights powered by the computer and rigged with switches to add coins. I designed the instructional graphic in middle to show how to control the GameEx software that I'm using (this is covering the original Xybots instructions). Though not really part of the control panel, I'm also using a mini keyboard remote to handle anything that the control panel can't.