Review on G-WORKS Gas Saver Plus with Lindal Valve Canister Shifter, Refill Adapter, and Air Vent Function by Doug Hawkins

Works great using a large 450g can to fill a smaller 4oz can. I was only able to fill them to 75%, but after chilling the receiving canister in the freezer for 5-10 minutes, I was able to fill them to 100%. In fact, I overfilled a few canisters by a few grams, so I burned them just in case. I don't know how to use the vent button. It just wastes fuel! When I press on it, gas escapes. If anyone knows the correct usage for this please let me know. Maybe I should have gotten the standard gas saver for less. Anyway, I'm satisfied. I now have a full shelf of 4 ounce cans! I find this size the most comfortable.