i know im not old enough to post in here, but i just wanted to help him out a bit.
if u did ur research you would know rv4 contains: 17a-methyl-1,4-androstadiene-3b,17b-diol (m1,4add), 19-norandrosta-4,9-diene-3b,17b-dione (tren), 2a,3a-epithio-17a-methyl-5a-androstan-17b-ol (esp). so your body is already use to these hormones in a way and ur gains wont be as strong. however, the mg per day of tren being used w/ tren extreme is 3x the amount used in rv4, so you will see some results just not as many as if your body never experienced tren prior.
anyways, i think you should take tren extreme BEFORE taking spawn. considering it has just as much tren in it as tren extreme but with a lil espitane added in it. Or if u just want to do one cycle and gains 10-20 lbs (i gained 20 from spawn) i would just buy a bottle of esp, 1 its cheaper, 2 with spawn u cant change up the dosages between tren and esp (meaning u can customize your dosage to ur own liking)
BEST LUCK to u