I did a repair on a 134a reachin couple weeks ago.
Dataplate charge was miniscule, like 11 ozs. It's not
often I work on really small units so like a dummy I inverted the bottle and filled my hoses and manifold.
There went 11 ozs. It was then I wondered just how am
I gonna get exactly 11ozs into the system without wasting that much or more.

What's a good way to do this?