Basically extends the height of the joystick to allow to perform small and precise analog movement easier. There are two versions; concave and convex. The idea is based from modded pro-gaming controllers that have extended joysticks for the same reason.
NOTE
Thanks to [Nintendo Switch model](http://www.thingiverse.com/thing:2046651) currently available, making this mod is easy as pie.
Your support will be appreciated.
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Also, if you don't have 3D printer, go to http://3dhubs.refr.cc/8BSLKTK for quick and easy 3D printing service. Thanks
EmperorFaiz
