We took out our 269BHDSK last week for the very first time and had some real torrential rain and some long steady rain (almost a day). We found 1 very tiny water leak that we'll ask our dealer to fix, it was between the 2 windows on the drives side slide, behind a trim piece.
Other then that our seals on the slides outs worked perfectly.
The only difference between our 2 units is I have the Eclipse package which should have no barring on the slide out construction.
2013 F-150 SC, Ecoboost, Max Tow, HD payload
2013 Solaire Eclipse 269BHDSK