I am still using electronics on my R80st. My 75-5 was a pain to adjust points so when boyer came out with the electronic system I jumped at it and never regretted it -- ran it for 10 years like that.
Recently I used a points amplifier system on R100-7 that I built from parts for $25 --- works very well. Engine runs smoother with electronic system.
I will probably convert my electronic beancan on the R80st to points beancan if I can find one forsale used. And then I will use the amplifier with the potentiometer that someone mentioned that can change your advance curve. The german system is pricey so I will not go that route.
Now if we could just get a DIY fuel injection system that didnt cost the earth.....