[Junkers]

This is probably not exactly the right section but I don't know where else to ask. Is it possible to add extra functions to a joystick, I mean like adding extra buttons or an extra axis for prop pitch control. I have a Saitek ST290 Pro and it would be really cool to add trim wheels, a button with a coverswitch for bombs and a prop pitch control. I've heard of guys making there own setups so it can't be too hard to modify one, can it? I would be extremely grateful for any advice. Thanks.