Thank you so much for the kind words!
The reason I worked on the mouth movements separately for left and right was to capture the naturally asymmetrical shape of a real personโs mouth, as seen in a smirk or a smile.
In terms of control methods, besides VBridgerโs Standard Preset, I separately created the formulas MouthSmileR and MouthSmileL and set them as inputs in VTube Studio. The same goes for the other parameters as well.
The overall mouth rigging structure was built based on the PerfectSync standard, so if you want to learn more about the structure, I also recommend checking out materials related to PerfectSync.
I hope this was helpful for your questions!