Bigger back button for FrSky X20 and X20S

I like a bigger back momentary SI button on the X20S so I designed this.  It replaces the plastic mechanism on the inside and has a screw on button top.

For the internal part, Support should only be used on the flat area that is suspended above the bed.  Make sure to use a support blocker to remove support from all other areas (screw hole, the + pad).  You don't want support inside the threads.

For the top button, It should be printed without support and printed upside down with the button on the bed.

After printing and removing the support, make sure the threads work all the way down before putting it on because it is hard to grip the button top to screw it down.

The internal part replaces the existing part.  Slide it into the posts that the old part goes into and then push the button up into place.  Be careful sliding the part on the posts as you don't want to break the posts.  If it is too tight, you can use a file worst case.  

You want the height of the button to be just slightly above the back case but high enough so that the internal button makes a distinct sound that it is going down all the way.

Note: See licensing terms before sharing or reproducing for others.  This is not licensed for commercial use.  Contact me for more information about licensing.

This needs to be printed using 0.1 mm layer height so that the threads will be more accurate.

You can use Cura's 'Outer wall inset' feature to bring the outer walls inward if the threads are too tight.  I usually use about 0.12mm for outer wall inset.