Sorry to hear about your shock troubles. I agree, the PS shock rebound adjuster is the one part that doesn't feel quite right in terms of design, with a vague adjuster feel at the low numbers; I've had other after market shocks (Ohlins and Fox) and I think their system are much superior. Having said that, the PS shock is great value and the adjuster seems to work as advertised on my bike. I suspect the other end of the adjuster screw is an eccentric that bears on the adjuster needle, and has a step where it drops from 5 back to 1. If you go the other way, you could be bending the end of the needle. Still feels like it needs a stronger spring in there to make the detente positions more pronounced.