Hi Elbeth!
I have read Paul Robinsons book, and plan to switch to Erfa as soon as I'm ready (working on my iron, B12, folate and vit. D). If you still don't feel 100% with your NDT dosage, I think you can learn a lot from his book. There are people on another forum (STTM T3-only discussion group on facebook) that is trying out his method with NDT, and it seems to work just as sucessfull! I'm following their progress to get some tips and advice for myself. And as far as I have learned, Stark's book on hypo 2 was a great inspiration for Paul's work too.