CGr,

While I may be speaking out of turn since I'm not Don, here are my 2 cents:

if you've built a couple of kits before, these will go together very easily I suspect. With Don having simplified their construction as well as having laser cut them, they will be "quick build" in nature. Some shaping of wood may be required on the fuse using sanding blocks. If you've never built a foam wing before, then these are also perhaps the ideal first wing to do so. The trickiest part of the build will likely be landing gear block and engine installation - mostly due to the smaller size of the models.

David.