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.
They aren’t locked out yet, the PSN requirement is in 1 month, and the Arrowhead CEO said they are discussing solutions to this problem specifically. I highly doubt they leave these players high and dry