Only way i know how to do this is a little cumbersome but in your BP, create an exposed array of transforms with the 3D widget exposed. Then in your construction script, set the transform of your instances with the values in your transform array.
Only way i know how to do this is a little cumbersome but in your BP, create an exposed array of transforms with the 3D widget exposed. Then in your construction script, set the transform of your instances with the values in your transform array.