Peter Clark wrote:
/snip/

I wonder why they would have gone back to sealed wet-wing when they
had bladders in there years ago. I wonder where I got that the new
ones still had bladders.

Peter,

They didn't "go back" to a wet wing, it was an engineering development
first used in the Cessna singles in the early eighties. Originally,
172's had removable aluminum tanks in the wing bays, and 182's used
bladders.

Integral tanks ("wet wings") are lighter, easier to build/assemble, have
greater fuel capacity, and if done properly, require less mainenance in
the long run.

Happy Flying!
Scott Skylane