We've found that out about the resistors. MB 190's also use a resistor, instead of a carbon brush, they also eat caps.
My 6 cap has a carbon brush with a spring behind it. Been on for years and years now.
When I bought my Crane it was 79 dinero, and the MSD was from Howards at just over two c-notes. Being as how they've been on for almost twenty years, two cars, and roughly 50+K miles. I'd say investment well spent. Bought a replacement cap(after I got away from the Bosch feldergarb, which I still have in its box, and a backup rotor, still on the standard/bluestreak rotor put in somewhere around 02