10 weeks should be plenty. How many cycles have you done? you can even push it 12, if you are still growing, but I highly doubt you will still be growing much past week 8 or 9 anyways. I stopped growing at week 7 off a test eq...i was planning on 12 weeks, didnt need it, got more than i wanted in 7. Sooner you stop, the sooner you can start again.