When do you start adding interior support structures?

Yeah, it's me again.

I'm working on my first design intended for completion (we'll see if I get that far!). DELAG's LZ-17, Sachsen--one of Zeppelin's pre-war civilian airships.

This is intended to be built at 1/250 scale which means the model will be 24.8" long and 2.29" in diameter. Since these early airships didn't have a very aerodynamic shape, most of it will be a consistent width tube about 17.8 inches in length. Clearly too big to be printed out on 8.5x11" sheets as a single part. It will have to be broken up. The question is: should I design to have as few, larger parts as possible, or should I go for more smaller parts? Would more seams for the smaller parts add strength to the structure or do smaller parts just increase the chance for misalignment between the parts?

Is there a strength advantage to using 110# card versus 67# card?

Should a model this size have an internal framework? At first I was thinking 'no' since it does have a triangular keel part that runs along the bottom of the main envelope. To be honest I'd rather avoid the complexity of an internal structure, but now I'm second guessing that, too.

Thoughts?

Thanks,

--jeff