FL-180 is the form used to finalize the judgment in a dissolution proceeding, and the contents of the stipulated judgment puts a rest on all issues covered, unless one of the parties withdraws a specific issue from the judgment. As you said, the FL-180 that he gave you “stays true” to what you have agreed upon. Therefore, there is almost no chance for him to “take advantage” of you because the marital settlement agreement which was notarized and intended to become an operative part of the judgment is now incorporated in the final judgment.
A lot of times, dissolution issues could pose problems or confusion, even if at first it seems easy and uncomplicated. For this reason, it is advisable to consult with a divorce attorney to be aware and knowledgeable of the right thing to do.