Tuning Ignition module observation (EFI Fundamentals course)

Hello HPA. First I want to thank you for these courses they are absolutely worth every penny. One small observation regarding your Combustion Pressure vs Crankshaft angle plot. In your discussions you have indicated that a positive ignition angle specification indicates an angular position before TDC and a negative spec is for the spark event occurring after TDC. On your plot (and I realize this isn't significant to the discussion) you have reversed your convention. Just wanted to point it out as a possible source of confusion. Thanks again for all your efforts, this is truly fantastic work!