As the name implies, these will extend your controller's sticks by approx. 5mm, making the controller seem more granular. I included the Sketchup file for those who want to modify it. Yes, these will also fit the CX-10a, as well as other similar controllers, ex. Propel's Atom.

Print at 100% infill. After printing, bevel the inside of the extensions hole with an exacto - it will be a tight fit, depending on how your printer 'blobs'.

Add the 'hat' to the extension first - so you can press firmly without harming the controller's stick-buttons, add the hat + extension to the controller second. Twist if necessary. Everything should fit together tightly - without fear of breakage.

Enjoy!