yo, when i shoot quads i go outer thigh halfway between hip and knee....kinda upper-outside....use a 1" needle...i prefer quick inject...sanitize and spread the skin tighter with your other hand and inject fast or slow whichever....once its in where you want it..pull back the plunger (aspirate) if you see blood, withdraw...if you see air bubbles ur good to go.

inject slowly and when your done apply pressure with a alcohol pad.

then ur g2g