Trello subtasks as checklist items with due dates with Butler

[NSM_Admin]

I use the following automation "code" to link card's as tasks in a checklist which work perfectly:

when an item starting with "##{*}" is added to a checklist by anyone, find a card titled "{wildcard1}", link the card with the item, post comment "Card linked in checklist \"{checklistname}\" on card \"{triggercardname}\" by {username} on {isodate} {time24}.", find the last card linked in the attachments, and post comment "Existing card \"{wildcard1}\" linked as item in checklist \"{checklistname}\" by {username} on {isodate} {time24}."

But I also want to assign the checklist task with the same due date as the linked card, but can not figure it out how to do that.

Anybody here who knows how to do this?

[milynnus]

@NSM_Admin 

If you look at Trello automation, the ability to assign dates in general does not provide for the use of another date field except for the card date CF. You cannot use the due date of another card.

To handle more unique requirements, it does mean would with code and api. For example, my client want the card due date to be the last item due date when a new date is added on an item.