Why not stick with PanF/Rodinal and keep working on it? Nothing wrong with trying a different film if that's what you want, but I'm sure with a little practice and experimentation you'll be able to get great stuff out of PanF/Rodinal. Just some thoughts. Technical Pan/Technidol was a totally different kind of thing though. PanF and Rodinal are both general purpose materials. Definitely not the same as Technical Pan or Technidol.