When I got my X56 Flight stick I couldn't stand the little joystick where your thumb rests. So I decided to mod it into an actual button. The Small joystick has a click in feature which registers as a button click. This mod just utilizes that click and works as a button.

You will need to take apart the main flight stick to access this. It's 5 outer screws to open the stick and then 2 small screws to pull out the small joystick module.

Once you remove the small stick from the module base there is a smaller stick under it. My button mod should slide (snuggly) over this stick. (You may need to widen the hole to clear any printing residuals). After that it's fitting the module back in place with the new button. (this may take some work, be careful not to pull or pinch any wires)

Once in place, replace the 2 screws for the module and then put the stick back together.

That's it!