Perhaps, if all you confirmed 'power solos' (snort, chortle!) have had trouble with girl singer after girl singer disappointing you, perhaps the fault lies with who YOU tend to get to want to sing with YOU...

The world is chock a block with great singers... but maybe they are looking for a GREAT player to back them up?

Not a machine. rolleyes
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An arranger is just a tool. What matters is what you build with it..!