well i used to do 3cc left quad, 3cc right quad, then i got fed up with hitting nerves and switched to glutes. I do 3cc left glute, then right glute. So two shots a week so both sides get one weeks' rest. Glutes I feel nothing, I just inject fast even. Next day slight sensation but then nothing.
Quads were convinient to shoot but if i hit nerves urgh...