Hi, is there a way to handle properties in python products in order to get similar funtionality in as propertysheets in python? I'm developing a product right now and it may be that I have to add some properties later (while in production). Right now I have to manually assign a newly added property to already existing instances, because adding the property in the _properties class attribute breaks the properties management tab of these instances. Am I missing something? What do others do? Oh yeah, and I even have a great proof that I tried to find an answer in the archieves, check out this nice page: http://www.y-tex.com/PYthon.html It totally sold me on python products, I really didn't know that they are *that* potent. cheers, oliver