Welcome to the forum, fellow 23B owner! Make sure you go to the new members forum and introduce yourself. Which weather stripping are you referring to, the stuff around the slide or the white plastic trim that fits in the channel?
Make sure you browse the mods section....lots of good ideas for harvesting underutilized storage spaces and making your trailer more enjoyable.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.