I'm trying to create a pattern of vent features in a cutout  The vent feature consists of a loft and is connected to the edge of the cutout with an extrusion.   I was wondering what type of pattern I should use.   I have tried curve driven pattern but it failes due to the extrusion not always merging to the rest of the part when it follows the curve.  Any thoughts or suggested directions?

BTW the vent is not complete yet in the picture it will have an additional extrusion in the middle to connect the lofts.