FYI.
TCM IO520 engine - magnetoto engine timing 20 degrees BTC +/- 1 degree.
Bendix 1200 - E gap timing 15 degrees +/- 2 degrees
Bendix 1200 - points gap 0.016 +/- 0.003 thou.
Champion - RHB32E gap 0.016 - 0.021.
So one magneto can be 19 deg TDC, E gap 13 deg, point gap 0.013& spark plug gap 0.016.
The other mag 21 deg TDC, E gap 17 deg, point gap 0.019& plug gap 0.021.