Hondaman,
I already have the Dyna S. Can one use the Dyna S pickups but use your ignition? Particularly since you stated that the dyna draws more power? If so, what are the results? That is, will I still have a good system with that combination. I can't see up close worth a crap anymore so not adjusting points is a good thing.
Me, too, on the "eyes don't have it" part: I now have 4 pairs of different glasses!
Well, uh....even if it does work OK, but it won't really give you the "backup" option of switching back to points if you managed to somehow kill my little box. The voltage that goes from this box to the points is approximately 1/2 battery voltage, so I'm not 100% sure if the Dyna S will still "fire" under those conditions (see Terry's comment above). Those systems are biased "on" all the time, until the magnet swings by, which turns that pickup "off" for a short time to fire the coil(s). I don't know if 6 or 7 volts will be enough for them to fully turn "on".
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I know my old Dyna S trigger quits working at 8 or 9 volts, but it's been more than abused...
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..so, I can't use that one for comparison.
Using stock Honda coils, the Dyna S uses about 1.85 times the normal coil currents (averaged over a whole engine cycle) of normal points-coils setups. In the case of the SOHC4 bikes, this is about 1.8 amps extra "lost" power (at 12 volts) when using the Dyna S. The Dyna III is a little better, at about 1.6 times the normal current-over-time (about 1.45 amps extra) because it stretches the coil "off" time a little. My unit uses a flat 0.24 amps extra current over points at 14 volts, about 0.11 amps extra at 6 volts, so it will still start a bike with low battery (kinda like a Ford system, my heroes...). This will allow those with 500/550/400/350F systems to have electronic ignition with halogen headlights and not suffer low battery syndrome all the time. The 750 has a stronger alternator, not quite so prone to these issues.
My personal test unit has around 6,000 miles on it, and Hcritz ran another tester for about 2,000 miles in Mississippi heat this year for me, no troubles. I've got some that have run for months on end (test bench) with no issues. Terry's running one for me "down under" this season (just in case electrons spin the other way, like toilets, down under.).
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