i find it difficult to aspirate with 25g pins. can't get much draw-back on the syringe when i pull back...usually prefer 23g pins for that reason, but maybe i just have really bad form. related: who has 'struck blood' aspirating with a 23 or 25g before?? did the blood barely trickle into the syringe, or was it more pronounced? and how hard do you usually pull back on the plunger (realize this is difficult to quantify)? i pull pretty fucking hard (causing excessive movement of the needle), to the point i imagine my tissue getting sucked into the needle (haha). this is an exaggeration of course, just curious how hard others pull back. cheers.