This model was designed for fairly easy and straightforward assembly. Part locations are easily identified.  The main hull utilizes several parts that are copied in order to produce the length without the need for distinct files. Each one is identified in the file name as to how many copies of that part to print out.
 
Due to the length of the hull, you can avoid nearly 60 hours of print time by utilizing a length of standard PVC pipe. If you can find it, 5” Schedule 40 pipe is the perfect size, but it’s incredibly hard to find. The other options are 4” at 4.5”OD or 6” at 6.625”. You can simply scale the files up or down to match those diameters. Scaling ratios are 0.857 for 4" and 1.262 for 6".  You’ll need to re-engineer the hull access, but I HIGHLY recommend the use of the PVC pipe due to strength and the elimination of the post-processing for this area. 
 
Model Specifications: 
 
Length: 1816 mm
Width: 140 mm
Height: 299 mm
 
Max part height is less than 170mm, making this model suitable to print on most 3D printers.
 
No file is included for the impeller, as in my experience filament printed propellers, particularly in this scale, are unsuitable for practical application. Max ID of the propeller shroud is 35mm, so a stock brass propeller of that diameter should be an excellent fit. 
 
The hull was designed so that a 3” diameter cylinder, such as the Nautilus Drydocks 300 Series SubDriver with the 3.75” diameter tank option, would fit perfectly.