@jessegrabowski Notebook looks slick. No idea why the paramerers are off, I guess it’s just an equally plausible configuration.
You won’t need to pass updates manually after Handle Scan in collect_default_updates · pymc-devs/pymc@a1744a8 · GitHub
After that PR I would also suggest using a CustomDist, as its nicer than the internal register_rv, but for now this is the only correct way.