RE: Depron Twinkle
did some more fondlings at lunch time. assembled the fin in a similar technique to the wing... hinge the trailing edge with hot glue, put in the ply keel assembly (ply part off the plans with two strips of depron shaped to form the fin's airfoil) trailing edge first. Then glue the front of the keel and finally close the leading edge. Pop in some motor extension wires and you're good to go.
Cut up some spruce stock for a motor stick, and bound a ground down tube motor mount to the stick with kevlar thread. The plane is designed for the CD-ROM style outrunners, so any 8mm tube mount is the ideal (others have created firewalls for their twinkles to mount firewall mounted motors).
The last pic is the sizing up of the stick to get the prop swinging in the desired location.