Hi, Recently I built a 30mm EDF with a 13 inch span. It works pretty good but I wanted something a little tamer and so I'm making another which will use a 5 gm out runner . It won't have as much power but I'm pretty sure I can cut out at least 20 gms from the 85 gm EDF.
Here are some pictures.
This is the link to the 30mm EDF where there are two flight videos.