HPTA is restored through the peptide of beta hCG, along with SERM’s & AI’s use. HCG is a hormone produced from the placenta during the early stages of pregnancy. It acts as an LH mimicker to hypothalamus. Human Chorionic Gonadotropin would eventually rise Luteinizing Hormone, which in turn will increase endogenous testosterone production. Afterwards, Selective Estrogen Receptors Modulators will act in hypothalamus as GnRH stimulants. Tamoxifen citrate and clomiphene citrate will lower estrogens selectively, meaning in specific tissues (as in breast, adipose, hypophysis). The drop in estrogens would signal for GnRH release from hypothalamus, thus LH & FSH will start to elevate from hypophyseal gland.
In terms of good PCT - despite the abstract link I placed here earlier I cannot comment - the only bad recovery I every had was after the only cycle that included any PCT at all. Time is the important factor in my opinion. I also believe many individuals are so stressed about recovery that this itself actually impacts on recovery. In terms of the subjective feelings of recovery - I have spoken to many long term steroid users who were unsure of what "normal" felt like and actually judge their recovery on regaining the sex drive they had whilst using 500 mg of test a week!