Mini CO2 regulator knob

I purchased this cheap CO2 regulator from Amazon for my planted aquarium and it works fine mostly except the stock knob on it is too small. Its hard to fine tune the flow. so I made this knob attachment that fits on top of the existing small knob and gives a better grip. enjoy

https://www.amazon.com/Regulator-Aquarium-Stainless-Solenoid-Standard/dp/B07C6HKTN6/ref=sr_1_2?ie=UTF8&qid=1531696548&sr=8-2&keywords=co2+regulator+aquarium