Sealing Double Doors

We have two, 3-0, wood, doors (side by side) that exit the studio. Does anybody have any tips on sealing these doors? We're very close to as sealed as we can get but are having a hard time getting both doors to close snug against the saddle/threshold. There is also the problem of sealing the gap between the doors. It seems finding the right astragal to close the gap is tricky. The seals are from Zero International. We also have the automatic door bottoms but haven't installed those yet. One door is active the other held closed by slide bolts. Th interior doors, once we got the method down from s guy that used to do installs for Zero International, were easy but double doors... ugh! I do have a call into him again to see if I can get some more assistance. I just thought there may be some creative ways people have sealed double doors. Thanks, Brad

I believe Rod Gervais' book covers this very subject rather well. len