Don't know if anyone is interested but I have a Mtl Stud family. Take a look and comment if you see errors.
I used the SSMA catalog to get the properties and types. Currently we were only interested in the overall shape. I will calculate the Xcg later as well, but for now I set them all at 0.500" I was going to add the structural properties at a later time since the only program we have to design ltga is RAM Advanse and there is no API, the need was not there. I also left the two tag placeholders empty for now.