GeekHand is a very interesting layout. You can find it here: https://github.com/GregDavidson/TwiddlerGeekHand
This is a mirrored version of GeekHand - left is right and right is left.
Geek_Hand_Mirrored_twiddler.cfg (634 Bytes)
That layout is not exactly mirrored. The Num/Alt/Ctrl/Shft keys are still in the same place. The Shft key especially is in an extremely uncomfortable place for the right hand, especially for being a commonly used key.
@strawberry The Twiddler's strength is that it is fully customizable. Tuner allows you to map any keystroke to any chord. So if you want to change the chord N R000 = 1 to S R000:
The screening on the key caps reflect the factory twiddler.cfg settings. You are free to map the layout to suit your needs.