I am working on a ModelConverterX update that will include better support for the placement of objects. One thing that will change is that placement information will be read from BGL files. But I am also changing the functionality in ModelConverterX that allows you to place objects. One of the main changes there is that you will be able to place multiple instances of the object, instead of only one at the moment. The screenshot below shows the new object placement form that I am working on. It will still take some time though before this functionality will be in the development release, at the moment it is still too buggy.