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SubCooling per floor of a house.
Getting a little progress done. One chart shows SC per 10' of riser.
10'=4.9psig drop=1.6*f temp drop(SC)
20'=9.7psig drop=3.1*f temp drop(SC)
30'=14.7psig drop=4.7*f temp drop(SC)
LL/FD = 4' of copper SGMI=3' LLSV=5'
1/2" 90* ell , long radius = 1' of copper
another chart is slightly different , 10' of rise is 2* of SC and 5* of SC at a 30' rise