wtf why are you using a 21 gauge needle to begin with, let alone for pgf2a???
slin pins work fine unless your a fatty. Bro you shoulld split your doses more, the half life is miniscule. aka instead of doing 1mg 3x do .5mg 6x....it will have better effect. As to the having to hang a sh*t, yea i do too. Just started the sh*t. I also get the slight coughy feeling also, but lemme tell ya, mine hurt like a motherfvcker.... What muscles you hittin?