it's not worth going to 40. The sides are bad at 30, and unbearable at 40.
i'd recommend a 20/20/30 dosage for you're weight. it's pretty safe if you take the right precautions : preloading supps for liver/heart, not exceeding 4 weeks, no alcohol, and not going above 30mg.
if the gains still aren't coming, then try phera-plex as your next cycle. sd non-responders like pp, and pp non-responders like sd, nobody knows why.
good luck.