Been there done that!
I found two things that helped.
1. Practice, Practice, Practice
2. I got some smaller 100 ml beakers and filled them to 60 ml (2 oz). That gives you the control on how much comes out at one time. The beakers need to be pyrex and can be obtained from chemical equipment companies, or contact your local independent pharmacist and ask him to order some for you next time he orders. I use 100 ml beaker for bodies and 50 ml beaker for different color tails or body parts.
Need any more info, just let me know.
Cal