1. Introductory topics a. muon production, TRIUMF cyclotron, M13 beamline b. muon decay c. motivation 2. Relavent Physics a. radiative corrections b. multiple scattering c. delta electrons d. primary photon conversion e. bhabha scattering 3. TWIST spectrometer a. magnet b. cradle and citals c. drift chambers d. proportional chambers e. gas system f. target g. beam package (muon ranging) h. tec (beam monitor/characterisation) i. scintillators 4. Michel spectrum analysis strategy a. mofia (unpacking, cross talk removal, classification, first guess, helix fitting) b. classification performance c. fit efficiency, resolution d. pi->enu energy calibration point e. end point energy calibration 5. Michel parameter analysis strategy a. blind analysis b. explain systematic uncertainties for PuXi 6. Systematic uncertainty estimates a. blind fit precision, bias b. estimates from data to data comparisons c. estimates from mc to mc comparisons 7. Results a. delta PuXi value b. opened box value 8. Conclusion(s)