Hi

Maybe these photos will explain. As Dave mentioned you want to get the turbine 2 cm higher than mounting rails (upright position). The reason for this is that the thrustline in this model is wrong.

The pipe/cone is fastened to the rails. The pipe outer pipe wall will touch the servo mount, but this is ok. I even sanded away some of the bottom former at the servo mount to get the pipe angle as i wanted.

In the rear you just let the pipe run through the model. No mods needed

Eirik