dgrace, I love this project, good job! Any updates? Did you get any artwork done yet?
By the way, you really should ignore the few loudspoken people against angled joysticks. Have you noticed how aggressive they speak against it? I've noticed that it's usually the same handful of guys that seem to hunt down any 4-player control panel projects and take over the thread with their "It's a sin to angle them!" nonsense.
Let me give you some encouragement. Take a look at your picture. Angled joysticks allows players 3 and 4 to be looking at the monitor instead of the wall. It also creates a small amount of additional feet/arm space between all of the players.
Poor fella, you got trounced by their agenda which made you second guess your control panel. Here's some actual constructive help that you could do without modification to your current control panel. You can upgrade your JLW joysticks to UltraStik 360's (which are based on JLW's) which allows you to program the direction: straight or angled. In other words, the joysticks are physically angled, but you can electronically change the direction to anything you want. UltraStiks allows you to program them on-the-fly so you can play 2-player simultaneous doublestick games like SmashTV perfectly. Heck, you don't even need to unscrew your current joysticks if you don't want to. You can add the UltraStik 360 circuit boards to the bottom of your current joysticks.
Keep your head up. Everything is looking great. Keep up the good work.