I've made a few arcade sticks for myself and friends, and customized my madcatz SF4 stick.
Here's the 4 player arcade stick setup I built for my mame cab
The sticks for player 1 & 2 are sanwa JLF's (octagon gates currently installed), player 3 and 4 have happ sticks. All the buttons are happ as well. The whole thing is made out of 3/4" plywood, and the JLF joysticks are installed with recessed brackets from the backside. This is connected to my PC through an i-pac4 usb interface unit, works great the 5-7 years I've had it.
Here's my SF4 stick for my ps3/4. I changed the balltop to a bat-top, custom dust cover on the stick with punch/kick symbols, some random things like red anodized bolts, and replaced the top with some artwork and an etched piece of plastic with some writing on it.