Nelson out of curiosity, how can you be sure he only took 10mg of Dbol a day. I mean he isn't very big, but I've seen smaller guys take more gear.
I've spoken with a lot of the old timers and they're pretty upfront about what they did. Zabo trained naturally until he was in his 40's so he had a SOLID foundation. Most guys from that time used a little juice just as a "topper" to already hard earned muscle. That's why they had a great quality to their muscle. (And Jim Caruso's photographer didn't hurt either). None of those guys got gyno. That shit didn't start happening to the late 70's.
As mentioned, in my avatar, I took 10 mgs of dbol a day and 200 mgs of Primo a week. I was ECSTATIC at the gains I got -- because I've been training naturally my whole life, seeing faster progress was making.