I have been on another 3D printed model "36" Northern Pike". The thread on RCGroups is
here.
It is a pusher prop configuration, and someone in the RCGroups thread came up with a mod to add a bungee hook so I will launch that way.
Quite an easy build, the wing sections in particular. They are keyed with dovetail joints that enforce proper alignment, then it is just a case of stacking the fuselage sections, one on top of another.
Airframe is ready. On to the motor and servo installation next.
Andrew