Group replacement for objects

Hi,

I try to replace objects with this bp:

but problem is when I add meshes into scene (dummy component in the bp) I need again arrange them in viewport (for example books on the shelf).

I also created blueprint class and try to cast him but he didn’t show my custom event triggered (in him). when creating bp class - all objects sets inside bp viewport exactly as on the map.

May there is possibility to use group actor for this purpose - I can’t find it.

please help

I found Developer Tools > Merge Actors. but for some mesh it not work

Developer Tools > Merge Actors