I have an Ergodox with palm rests and I want to add a USB expansion port (or two) on the right side. It should be pretty easy, since I just need to splice in a USB hub. Has anyone done something like this before? Have any notes? I suspect I can't merely daisy chain the wire but will instead need to put the hub controller between the computer and the keyboard. Additionally I will need to cut out some space in the third layer of plastic for the slot(s) and any advice there would be much appreciated. Lastly, I'd appreciate if anyone could recommend a good, small USB hubs I could disassemble, or maybe a USB hub controller that I could purchase that is already easy to splice in.