Draw time from the bottle to the syringe with a slin pin is forever , and the liquid gets little air bubbles trapped in it , making dosing difficult . I will have to time it , I can ' t see it being more than 15 seconds . We might have different oils . Mine is grape seed oil . 68 F this time of year , but when it was 80 F in my house , wasn ' t much quicker . Also never had a problem with bubbles , just one large one at the top , but that ' s easy to fix . What size slin pin were you using for test ? . 25 ml on a 3 ml is actually pretty easy to seeShit , the ones I had used . 2 mL markers . plus the larger diameter means the error of margin is larger . slin pins are like 14 inch diameter ? meh , what works for you might not work for me , and vice versa . I just love my slins .