In your initial comment I thought you wanted to keep the design and only add an adjuster. I was merely pointing out that you’d need a new needle each time. My guess is that these things are designed for the lowest common denominator. Trusting that people are actually going to replace the needle between dosages is probably a bad idea.
Woah woah woah there buddy. I’ve only placed the requisite amount of peer pressure required to ensure long lasting managed democracy throughout the galaxy.