theres no such thing as hardening up gains
its an old rumour in bodybuilding community where guys would think taking a non aromatising steroid at the end of there cycle (which helps gives the body a harder or drier appearance) would solidify gains made on a cycle
wen in all reality all your doing is lowering water retention and increasing the anabolic hormones in your body since your increaseing the total amount of mgs of steroids in your system
e.g guys running test and dbol all throughout there cycle would introduce winnie, masteron, tren in the last 4 weeks
this would dry and harden them up making it appear uve hardened or solidified ur gains, wen in all reality you just loose water retention while retaining the same amount of muscle and look more vascular before there PCT started
do not concern urself with this rumour