Would there be any harm in extending a test e 500mg/wk cycle from 12 weeks to 14 or even 15 weeks? And would PCT look the same
Why not? I personally wouldn’t go over 16 weeks.
And the short generally accepted answer is yes 40/40/20/20, altho iv seen people run an extra 2 weeks at 10 on longer cycles. Not sure if there is any data backing this method to be more effective tho.
Go for it. As long as you’re controlling side effects, training hard, and eating right you should have no issue going a little longer.