"My point is that we don't know what they're buying and if the parts they're buying have already been determined to be must have parts regardless of potential design changes if there will be any design changes."
That is a valid point if only using JBII. Your use of the automotive industry analogy is totally illogical, although I understand where you're going with it. One can not compare JBII to a dynamic assembly line company whatsoever. Auto factories can not just buy some chassis and make them fit an assembly line. Doesn't work that way.
Your final comment is more correct if one thinks johny will buy tanks, piping or electrical boxes and such that would fit any p2o machine. But, the point of debate is WHY would jbii buy any new parts when #3 isn't even proven to be commercially viable yet.
The feeling here is, well we're really not sure no #3 is really going to do that great, so I gotta keep trying something else and I need to buy stuff for that. People can build cars faster than johhny can get one machine complete at the same time. The mass production part is one of the biggest lies as well. 30 days running ain't shit.