Hi,
Since I did not found anything about wrecking balls having a limited number of usages I am adding this as a bug:
I made three wrecking balls to get rid of my pali. After I used them 5 or 6 times each, all of them no longer have "Wreck" in the menu after beeing assembled even if I wait more than one day. I tried disassembling and assembling in a different positions along the palisade a few times but "Wreck" still does not appear
Screenshot with position of the wrecking ball : http://game.havenandhearth.com/mt/ss/b60cc37e6ba579b6 in case somebody thinks it was assembled too far. With shift+ctrl this was the closest position possible.
Thanks