Nah.
I just used one I've had for over 20 years. They've changed the fittings since then and they will not refill the old bottles...that's all. I can still use the old bottles, the gas is still good.
The new fittings/bottles have incorporated and automatic shut-off if the bottles are turned over. They will accept the old (female) or the new (male) fittings....the new bottles have male and female fittings. They will not refill the old female only bottles.
I also have the capability to refill the small (usually green) one pound bottles.
I did my homework.
Do you have to turn the 20lb tank upside down when refilling the small green bottles?