I draw the oil out with a 20g needle (flows like water), then pop on a 25g for injecting. Never been a problem. Yeah, you have to apply a significant load of pressure especially with certain brands of tren, but it ain't no thing. Just push that mawfaw. Takes probably 25 seconds total, and that's because I ease it in real slow.
BTW, when you say you knicked the needle...on what? Just a nerve? I've done that, and my quad jerks uncontrollably real quick. Just hold the needle steady and keep pushing.