Are you repairing it yourself or taking it to a facility (ie dealer or repair facility)
if you're removing everything from the slide, can you take the measurements?
The unit is only 3 years old, going a bit farther, did you determine the source of the water damage, cause if that's not fixed, then you'll be dealing with the problem again.
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Mark, Vicki, & Scout THE dog
2015 Hemisphere 282RK
2016 GMC 3500HD Duramax dually
1992 Goldwing Aspencade