Procedural Queue
In this case, the queue items are placed back to back along the target curve. The negative Y direction of an object is considered to be its front, and the positive Y direction is considered as the back, following the usual norm across Blender.
In this case, the queue items will directly face the Look At Object. And just like the previous case, if your objects are looking away, rotate the target object before creating the queue such that the front side points toward the negative Y axis.
Known Limitations: The target object(s) has to be a single standalone object(s). Technically speaking, the add-on runs on Geometry Nodes which can take an object input but ignores any child object attached to the target. Hence, if you have a complex object with many different child parts, only the main body which you select will be placed along the queue, the child parts won't be copied. You can manually duplicate the child parts later.
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