CO2 Needle Valve Recommendation . . .

[DaveWatkin]

That's good to know, the one I have mentioned above is garbage. Currently just using the regulator to control.

 

[JAX3000]

This is literally the exact information I needed. I am having the same experience with my co2 art needle valve. If you so much as LOOK at it too hard, the bubble rate shifts into ridiculously low or dangerously high levels. It also creeps up and down when nobody's looking, which I find extremely disturbing, considering the time effort and money in that tank.
So, I took your advice and bought this Camozzi one off Co2 Supermarket https://www.co2supermarket.co.uk/precision-camozzi-flow-controller-customiser-p331.html
I went for configuration B-A, hope that's right...!
It arrives tomorrow. I'm sure this will be a great help and all thanks to UKAPS!
(I'm especially pleased about the locking nut feature, so when it's set, it's set...)
I'll report back with my findings for future people in the same situation.
Thanks guys!