Well I suckered for it. Bought the HF brass fitting whereby you can
transfer some propane from your barbeque type bottle to your hand held
flask.
http://www.harborfreight.com/cpi/cta...emnumber=45989
Tried it, BUT, it only fills the flask to about 10%±. I'm just guessing by
weight.
The flask in this instance does have a shrader valve on it and I could pull
a vacuum prior to filling. Would this be of great help? If I inverted the
pair of tanks would I be able to get liquid into the tank? I would be happy
if I could get near the 50% mark. Son-in-law is going through a lot of this
stuff doing candle art.

Advice appreciated. BTW, did give it about a half hour. It does fill, but
not much.

Ivan Vegvary