Another option would be to add an attachTo tool within 3DEN, which would allow you to place two objects down and click attach. Say:
1 - Place two objects.
2 - Right click the object you are attaching.
3 - Select "Attach To".
4 - Draw line to/ select object you are attaching to.
5 - Script works out relative pos with worldToModel and get/setVectorDirAndUp..
6 - WIN
I want to look into doing this but could be something devs are planning on.