I came across this tool which is simular to the mini-vac but claims to be better. This system is called the Phoneix System.
Here is the URL
http://www.brakebleeder.com/technical.php
http://www.gwrauto.com/phoenix/phxinj.html
I just placed and order for this tool. The guy claims it will resolve and brake bleeding problem and eliminate all air in the system. He explained that all systems still have air after bleeding unless you bleed the system from the bleed screw up to the reservoir.
I purchased it and will let you know how it works.
Has anyone heard of this tool?