Thanks for that response. For the record, I do have join legal custody, and my X has residential custody. The agreement is entirely silent on the question of where parties reside and on the matter of travelling with the children. All of that is somehow to be resolved under the principle of what is "reasonable," and I agree that there appears to be too little good will to make that work on its own. I'll be seeing my attorney next week to discuss the issue and hope to have a general sense of the options before that.