Nice to report something positive!
I'm now about 10 days into my switch from Levo to NDT and the first thing that happened was that my constipation stopped almost immediately - very, very exciting!! (I've been constipated for years, since the menopause I think, which seemed to get even worse on Levo).
Another change - hair has started growing on my legs.
That's about it so far - but I'm feeling really hopeful now that eventually my fatigue will improve.