[dwcsr]

First rule is replace only whats rotted, don't replace the entire corner just because you bought a whole corner if it only needs a few inches done. Fix rather than replace.

ALL panel need fitting regardless of maker or seller. If you cut out a panel on one 55 it may not fit another 55 so using Used panels doesn't always get you good fitting panels.

Some panels are better than others. Steps and corners for 55-59 from Dynacorn are better in my opinion but cost more.

There are vendors here that actually install what they sell so ask them.