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I propose that if the cap tube were not wrapped around the suction, that all the figures would look much better. But like you said Gary, the gas is condensing in the cap tube and as such an extension of the condener. So for that matter, if you take the temperature at the outlet of the condensing coil, you're not really measuring the condenser outlet temperature.... because the condenser ends halfway down the cap tube.
He probably needs at least one more foot of cap tube to balance it all out and get the proper subcooling.