Right little finger on 'ctrl'. Left little finger on 'x'.

With proper touch-typing, that's how we type shift+x too, i.e., right little finger on 'shift' and left little finger on 'x'.

people actually use right-ctrl and right-shift? i forgot those keys even existed.

but why not just use the left-ctrl? it's as easy as can be: pinky on ctrl, index finger on x, they're the perfect distance apart, you press them in one fluid movement.

maybe I find this easier because I'm left handed?

My laptop keyboards don't have them, so even though I learned to use them, I'm picking up bad habits.

Right pinky control key and left middle finger `x`. Or switch to Dvorak and it's easiest to use left pinky on control and right index finger on `x` (`x` on Dvorak is the same as `b` in QWERTY).

I actually found most of the popular chords were much easier to type when I switched to Dvorak.