How long did it take you guys before this was second nature? I am batting about 250-300 after about 100 swings? Often after he hits, when he moves the slightest bit to loosen the tie he looses the vein. Do people recommend pushing a needle all the way in? How bad is it if you're booting C and you come out of the vein but keep shooting? How many times will you use the same syringe under duress. Thanks- - B .