Hi Ariege, For your part 1, the ‘set selection items’ is only used for populating ‘list type’ objects.
To remedy this, one thing that can be done cover all of bases, is to create several different checkbox groups which can by default be hidden. Then, based on the responses to your option 1, the “set state” object can be used to show a customized checkbox group which shows 1,2,3,4,and 6 for example. If the user answers a different way, just show a different customized checkbox group which shows 1,3,4,and 5. See where I’m going with this? Just make sure that if the user changes the values of option 1, the “set state” object is used to hide the incorrect checkbox group and show the correct one.