I've kicked the idea around of making one out of a Hasagawa model, but not a variable toy. There really are a lot of differences between an SDP-1 and a VF-1. The shape may look similar at first glance, but upon closer inspection, you see that almost every part is different. It's kind of like comparing an old F/A-18 to a new Super Hornet. From a distance, they look alike, but close-up they are totally different. Not to mention the fact that there are a lot of extra parts that would have to be made.