That YF-19 isnt quite exactly the same. He kitbashed it to make it posable. Having those pictures in the model section might be a bit misleading.
Looks great Jesse, cant wait to see more.
I think any modeler make modification to the model he built, and the finished product is unique, there isn't just one way to finish a model, a finished model pics just give you an idea how the model may look when finished.
Imo adding a note with the modification is sufficent, the external look don't change so much from the fixed-pose version, he did an excellent work in making it posable.