Too many projects, too little time! But I finally got back to this one and have made some good head way. Using a milligram scale, I was able to match the feed from the syringe and the output of the Moineau pump. The Moineau pump now has the longer chamber mentioned in the last posting. I built a little frame to hold the Syringe Pump and the electronics that controls them. Here it all is at MakerFaire San Diego in early October.