While the conversion kit for this model is not currently being produced, I've decided to release the 3D files to create the tilting jet nozzles at the back of the Flying Sub from Voyage to the Bottom of the Sea. 

These files are scaled to perfectly fit the existing openings in the model. A detailed overview of a completed model can be found on my YouTube channel here. 
 
NOTE: Files are NOT for distribution and all rights are reserved.