Beautiful! Thank you!
Concerning the Warbird, there are a few areas at the bottom of the ship where the lower neck strut is connected to the engine section of the ship and where the top neck strut is attached to the head. There are small pieces all over the ship intersecting. I can't say if this is a big problem but I'm sure that it makes aligning the parts fairly difficult. A test build should be more insightful.
Other than that I assume that this is the best Romulan Warbird paper model available at this time. Thank you for sharing!