You have to start the build by the tail anyway, that's the most logical path. And if you put little weights in it's legs it should stand perfectly straight. It's just easier since it has 4 legs on the ground. Making papercrafts with 2 legs is much harder to physic. And all of the previous models of Vulpix also had the tail sepparate and it was not functional, so I attached it to the body, now it's really easy to do