These kits build just fine and they are great lookers and flyers, a jig to build the wings never hurts, I've built several Royal kits and they were some of my favorites, should you end up with a not so straight trailing edge of a wing, by wetting the surfaces and applying opposite pressure while it dries, takes care of the problem.
If you have built a couple of kits before this one you shouldn't have any problems, using brain power is also just as helpful as using jigs.