Sounds pretty good. I like the news of the strong magnets. You can fit them on a Commando without machining, but they look kind of vulnerable sticking out of the timing cover. It also has no advance mechanism when fitted this way. Fine for a racer, but not so hot for the street. This pictue of my featherbed frame with Commando engine, taken as I bought it in 1984, shows an original Joe Hunt mag bolted on in place of the points. I remember seeing the same setup on some dirt track racers with Commando engines.
This is a picture of the parts kit to fit it to a Commando.
It worked pretty well, but the hex key drive eventually wore too much, and I replaced it with points. It's been wearing an ARD mag for the last 15 years or so.
I had a couple Commando 920 engines back in the '80s that had been modified by George at HPI to fit a magneto behind the engine on the back of the timing cover, like the Atlas, but never took any pictures. I used the early ARD mags that were based on the same basic Fairbanks Morse points and coil magneto that Joe Hunt used for his. They worked really well, but it took a bit of welding and machining on the crankcase, and the use of Atlas timing gears and chains inside, as well as the Atlas centrifugal timing mechanism. I broke the crankcases on both the engines, and never had another set converted. By then Alan at ARD had developed his compact electronic mag that fit in the points housing, and I used that instead.