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There is a useful publishing rule available in the FarCry CM CMS Plugin called "Hand Picked Rule". This allows you to hand-pick a specific content type for inclusion on a page using a specific teaser display. However, the hand-picked rule needs to be told which content types are eligible to be picked. As your bslPromoTile content type is brand-new you'll need to override the default list of content types and add your own.
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