As just about all of us have read here, certain models of WW trailers have defects that have resulted in a number of different problems. To one degree or another, this subject has come up on this for...
Make sure that 28 footer has 3 axles - if it only has 2 - RUN! They made a few with 2 and realized that it couldn't do the job. The FSW2800, although it may have the somewhat lighter aluminum siding than most of the gelcoat ones you typically see, it is a widebody model (heavier, more liquid storage etc.). You should be in the balpark with your truck though... Dan