I've not used the Revolution 2.0/1.5/2.0 spokes, I've chosen the Competition 2.0/1.8/2.0 spokes. I did read that the narrower gauge spokes will wind up more easily while tensioning, and releasing that windup could be the cause of the rim going out of true. I don't recall you mentioning anything about prepping the threads - I've always dipped the spoke threads in linseed oil before lacing them up.

Do you have a means to hold the spoke to prevent windup while tensioning? I don't have that type of tool, but while tensioning I go a little last the rotation that I think is correct and then back up a bit to try and prevent windup.

How are you determining the spoke tension?