I train 3 times a week, 25-40 min each workout only doing 10 sec rest between set.. started this 1 moth ago since a just got a baby and dont have time to train as much as i used to, i maintain a good size at 800mg primo....
Also mentzer did have some very good tips, both training and diet wise... only eating 1g protein per kg bodyweight, i dont know about the biggest abusers but i have tried this for 3 weeks now, and i havent lost any more size since i started...
Offcourse when i was abusing i was eating plenty more, but thats was because i didnt know better....