Foreword: On April 2017, I received an e-mail asking for a customized adapter that would allow a gamer to play The Legend of Zelda: Breath of the Wild using only the right hand. However, the person who requested it didn't provide me with any feedback after the first prototype was finished. So, I started testing it on my own and discovered that, although it worked properly, its use would be uncomfortable for a lot of users. Due to its size and shape, only gamers with big hands and/or long fingers could use it comfortably. For that reason, I strongly encourage you to try out my other two adapters, which proved to be more successful:

For left-handed users: https://www.prusaprinters.org/prints/121732-single-hand-joy-con-adapter-left-hand

For right-handed users: https://www.prusaprinters.org/prints/121741-single-hand-joy-con-adapter-right-hand 

In December 2017 and January, 2018 I received a couple of requests asking for some improvements upon this design. So, now I'm updating it, with a couple of new features.

First of all, now you can choose from two different bases: One optimized for left-handed users and other one for right-handed users. The other parts of the assembly will work seamlessly with both of them.

I adjusted the dimensions for the Base.stl files. Now they can hold both Joy-Cons in a more efficient (and safe!) way. For extra security, I included a new part: JoyConBelt.stl, whose purpose is to act as a "lock" to prevent the Joy-Cons from slipping.