I'm trying to make myself a controller to use for Street Fighter.

I bought a wired xbox 360 controller and disassembled it to get the PCB from it.

I originally did this 2 years ago, and housed the controller in a shoe box. Everything worked great. However, this eventually wore down, and i'm trying to rebuild it in a sleek aluminium hobby box.

I drilled holes and put the buttons in, then soldered wires from the PCB to the buttons. All of the buttons work fine.

I was pretty much done, so i glued everything in place, using a piece of cardboard as insulation between the case and the PCB.

After finishing and closing it all up, i opened Street Fighter to give it a test.

Any time my hands are in contact with the box, it automatically fires the two xbox360 shoulder triggers.

The other buttons all had one wire to the relevant PCB location (black), and another wire to the grounding (red)

The two shoulder triggers were different to all the other buttons. These had two locations i had to solder wires to, and also required a capacitor (i think thats what its called?) on one of the wires.

The problem seems to happen intermitently. Sometimes i can touch the box, and its fine, others times not.

I've reopened it, and moved the PCB further from the casings, but its still happening.

There's no exposed wires that are touching the box.

Please help.