Alexander DePauli writes:

... using Zope management interface with custom objects ... The form actions of the Zope management interface are not built in. They are methods of the managed objects.

This implies, if your objects override these management method, you get different behaviour. I am not sure, whether ZClass'es will allow you to override the methods. If not, you will need special Python base classes that implement the basic infrastructure for you ZClasses. Dieter