Testan: there will never be aromatase issues with this compound. It is essentially not a hormone, has no steroid ring structure, and is chemically incapable of being converted to estrogen, e2, or any other estrogenic compound.
Brook: Yes, I have used aas. Mostly short (4-6 week)cycles w/moderate dosages of test only (up to 500mg/w), though I've played with proviron within those cycles as well and not really seen a difference except in my pants (prov. make strong like bull!). In addition, I've always ran Swale's HCG protocol and done pretty non-aggressive SERM PCT and still recovered well. Never gained more than 15 lbs on a cycle, but I've never lost more than half of that post cycle, and I keep just about all of my strength gains, which is really my main concern. I seem to be estro sensitive (water and nips) even on a reasonable dose of AI (.5mg adex/day). So I've determined that I'm estro sensitive (or have a naturally high level of aromatase), but have a relatively resilient HPTA.
I would LOVE to run a non-aromatizable only cycle, but people seem to lose their doo doo if you mention running a cycle without test. I never FULLY understood why, as androgen receptors don't know what they're being activated by, and mast/prov would seem like it would make sense as well, and these compounds are theoretically less suppressive than test. However, these compounds have some drawbacks, in that they seem to have limited action inside of skeletal muscle, and they have all the normal androgen side effects. This is where the possible advantages of s-4 come in.
Theres SUPPOSED to be a reasonable amount of selectivity in S-4 (and I have access to real stuff, not the BS supplements), in that it binds to the AR in skeletal muscle as strongly as test, but in other tissues with 1/3 as much as test. COUPLED with the non-hpta suppressive nature of S4, one could create some pretty sick, minimally suppressive, non aromatizing stacks with other drugs out there (primo, var, halo, tbol, etc) that are also minimally suppressive. What would you end up with? A lean-gaining cycle, heavy on strength increase, with no ancillaries needed, and minimal pct, making recovery a BREEZE.
And if cows could fly, my oh my, but thats why I'm trying to get some ideas about this or at least stir the pot a little and see what ideas bubble up.
Alternatively: it could be das uber-bridge. A TRULY non-suppressive bridge. I wonder about AR downregulation though...
Oh yeah... its also perfectly legal to posess.
Longwinded, but this COULD be huge....