If you plan on playing with this beauty then you should probably glue all of your pieces on tight; however, if you are like me, and only pose your high end collectibles occasionally when you decide to dust, if even then, then a dry fitting should suffice.
I didn't use a drop of glue anywhere on my SDF-1, and all the parts fit like the best snap-fit kits I've ever built.
Again, if you 'play' with this thing then glue it, but if you 'pose & display' then you should be ok.