Chic, thank you for the tip, I'm doing something similar, my current door is about a year old and has about 3 builds done on it, I also used the drywall sheets cut in half, I just came back from HD, I got me a new door and a few other nick nacks I needed to build me 3 new sanding blocks.
Moving forward with the V stab, since the Fin 5 part fitted so good I went ahead and glued the rear V post