If you fly with thumbs. I always pinch the right stick. Used thumbs for almost ten years then switched to pinching the collective/right stick becuase it felt more precise. I've had issues with tiny muscle spasms and both fingers give me the stability and precision i need on the right stick. I'm actually really excited how this hobby and increased use of commercial UAVs will bring alot more people with disabilities into aviation. Sorry to be off topic.
I bought red anodized knobs when i flew with thumbs, whats nice is that the solo controller has normal sticks, so im pretty sure you can take them out and mess with them just like Taranis or Spektrum sticks.