The main body obviously started as 2 separate model pieces, but I decided to combine them into one element, which took a long time.
I have saved a small amount of texture space that would have been 'wasted' on areas of the body that could not be seen, if it was 2 separate elements instead of one combined element.
Since I plan on trying out the Kane's Wrath propeller method, I have not bothered with modelling the propellers.