Does the 5000iu option come with the 5000iu's in a vial? If so you might be able to reconstitute it in there, depending on the size of the vial. I was splitting my 10,000iu vial with a friend so had to dilute it a lot. I diluted it so that 1ml had 500iu's in it and inject 50 ml's 2x/week (actually like 60ml's 2x/week and my buddy does 40ml's because I outweigh him by 100lbs).
are you saying you are injecting 60ml and your bud is injecting 40ml twice a week......60ml is a large injection bro??

very large!!!