Rechargeable 12 gr CO2, Anybody have any luck?

[superchikn]

I am wondering if anyone has used the rechargeable 12g CO2 cartridges with any luck.  I bought two from Ali Express and the thread tolerances were garbage and they would not hold pressure. 

Is there a brand that works or is the design flawed?
Thanks

[dv8eod]

Overall, the design is flawed. I bought one a couple of years ago to experiment with. It fills the same way a butane lighter does, with about the same amount of waste. They need to go into the freezer before even attempting to fill. Being a small bottle, it warms up fairly quickly as you try to fill, also. Mine did work, but I got very few shots out of it.