From what I understand the RV-14 is final size, and the RV-10 is moving over to it as older parts stores are exhausted. Not heard anything about the older models though. Some parts are shared among types, so you might find the odd part is final size. I had to order a new VS skin for an 8 (don’t ask!) and that came final size. I think Van’s said it’s the same as the 14 VS skin.