Fermi Level Entry no 1
Fermi Level Entry no 2
Fermi Level Entry no 3

Need to think about fermi more carefully.
New method showed little band bending.
Designs I've simulated previously with bending went away....

I have a few ideas on how to do it but will discuss monday
Fixed donor density calc

greatly improves bending of bands now it's right
Example file
small
merge troubles