If you're not having any problems and blood work keeps coming back clean and you're still making gains, then I say go as long as you want.
Agreed.
Although I think there has to be certain parameters. Meaning I wouldn't stay on tren for 20 weeks just cos my bloodwork was fine. Tren is strong stuff. Although I wouldn't think twice about doing a 20 week test cycle (with others). But I would up the dose when hitting plaeteus.
I know what you mean about following certain guildlines/rules. It has led me to think I wouldn't take tren a longer than about 8 weeks. But the above statment still applies. If everything is coming back fine I don't see the harm. But yeah with tren the most I would probably ever do is about 12 weeks. I am one to extend if I feel I would get better results whilst not risking very bad sides (I done tren a about 10 weeks a few cycles back). But I tend to think many things work best for about the 8 week marker.
So if it was me and I was gonna do a long cycle I would obviously have test as a base and up when needed. Instead of taking a compliment for 20 weeks I would do so for 8-10 weeks then swop over to another. Something like mast or primo then tren to finish off.
There are so many different approaches and all can be effective. I plan to base most of my future cycles around blasts of about 8 weeks.
Oh just curious but do you follow the same rules with orals too? Cos I wouldn't go above 4 weeks for adrol or dbol. I like doing 3 on 3 off 3 on with both. But I would do 80mg avar for 10 weeks. I know people who run dbol for 10 weeks (atleast the 50mg mark) and I just think that is plain asking for trouble.