Can I modify the form after the toolkit controls have been added?

Yes, the form remains yours to change.  In order for the toolkit functions to continue working properly, the following rules should apply:

1. The toolkit controls added to the form should not be deleted.

2. The toolkit required fields should not be removed from the query the form is based on.

3. The toolkit functions applied to the form should continue to be used in the events they are applied to. In the case of code being added to an event, the functions can be run from within the new code.