We owned a 2005 Z241. Check the manufacturing date on the trailer. It was the trailers manufactured before October 2004 that had a lot of problems.
The one I remebered reading about the most was the gap between the wheel well and the trailer wall. it let in a lot of water if the trailers was driven in rain.
We didn't have any of those problems and our trailer was mostly painfree for the five years we owned it.
Me, DW, Five Crazy Felines, One RB Angel
2011 Ford F350 SD, PSD 6.7, SRW, CC
2011 Komfort 3230FRK