Yep it wont work but you can refill disposables and flame king cans with the flame king refill kit.by cutting off the little plastic line up thingy off the flame king refill valve.not that im recommending it tho.
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I have the kit, I cut out the notch to use regular tanks.
BUT I went with the actual proper refill bottles from Flame King.
I was worried how thin the disposable tanks are.
Using the flame king tanks, I can refill a tank in under a minute. Using the disposable tanks, I had to weight them, fill them, let air out, fill more, let more air out, fill more, it took me alot longer to fill them up.
The flame king bottles are under 12 dollars on amazon.
The bonus is I can fit about a pound and a half of propane in the flame king tanks. I DO NOT recommend overfilling these, do at your own risk, it is clearly written to stop filling once the gas bleeds out of the valve on top.