Good to be bad, on and off. The band is looking at getting back together, so I may be back to DMing again, for a while, at any rate.
Honestly, I don't know what to make of it. This is one of those... combos where there was clearly no intent of them ever working together. I'm leaning towards no. However, I did toy with the idea of "Yes, but because the other heads can't manifest naturally, you can only target yourself with your secondary manifest." (Psionic/Magic transparency)
Even then, I see this as horribly unbalancing, this breaks the action economy, big time.