You are doing such a nice job with this that I am inspired to try it. I extended the standard model by 20 inches and did a paper model. I am not as good as you are with the model so I will cut wood at small scale and try it. Then I will know if the shapes fit for the full scale model.
Matukas, greetings and all the best on this adventure. I am happy to share my experiences and opinions with you. Travelling for 10 days, so currently difficult on phone. If you want to email me we can correspond directly. My email: