Grob Driver, I have put a similar posting about UK Orphans on the PFA BB. There are a couple of replies that you might want to read which may put your fears about operating on a PFA Permit to rest.
One thing I don't really understand is why are some Owner/Operators so desperate to hang on to the C of A?
For the huge savings that are there to be had by operating on a PFA Permit instead of the C of A, not to mention not having to deal with the CAA, I wonder why we aren't grabbing this opportunity for all we're worth.