Removed the clecos from the top edge of the passenger's door. This portion of the seal is now secure.
Further sanded the pilot's door edge to prepare for gluing, and then cleaned with acetone.
Glued the pilot's door weather seal to the door using GE Silicone 2+ Clear 100% Silicone sealer, and clamped with clecos thru 1" x 3" aluminum strips to distrubute the force.