I have friends that run tren alone for 6 weeks straight....well 40ccs=40days...but i have read that when mixing a test in the cycle you should cut the amount of tren in half per day...tren and test is supposed the be the god of cycles...but personally i would go ahead and run the full cc of tren...ive done 14ccs of tren eod and i had great results...not size i just cut up pretty nicely...good luck bro