I always pin in my glutes using a 21g (1 1/2) but as a result of only using my glutes I have developed scar tissue and injections are becoming difficult. So i need to switch to my quads. The problem I have is that my quads have literally zero fat, when I do the BF test they can barley get the calipers to grab. The other day I tried to use a 23g (1 1/4) but when i put it next to my quad it just looked to big and i was worried i'd go to far in. Can any one suggest what the smallest needle I can use for quads would be?