Ok, did some charging over the last 8 hrs. Here's some numbers:
Ambient temp: 81-83F
Low side: 22.5 psi / -2F
High side: 179 psi / 93F
Suction line temp: 9.2F
2 gal res temp: -2.8F (-19.3C) --All I could find for this time of year was "rainx 2-in-1" which says it's good to -25. The res is simply a 5gal bucket with about 10' of tubing from the pump to the HX input, and maybe 2' of tubing from HX output into the bucket.
Equalization psi: After 5 min or so--Low: +120 High:148
So, if I understand things correctly, my superheat is ~ 11.2. I ended up using 1 complete 15oz. can of R-22.
I did not take the compressorr temp or amps, but I will do that when I work with it some more--after I get some sleep. The heaters should be here today--gotta love Fedex home delivery.
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