I only just had time to look at this video. Wow, Christine is basically talking about exactly what Sigma is attempting to do with GE. Right down to Sigma's last patent. (The context is better in the video than i write here)
Christine discusses how to control additive, including what temperatures lasers run at, sure enough Sigma come up with a solution...
Sigma Labs patent: "Mr. Cola further elaborated, “To know precisely when the laser is putting in just the right amount of energy into the powder layer - not too much and not too little - so that the layer is completely melted without overheating it is very important. Our new sensor and data analysis invention helps to accomplish just that - determine optimal coupling between the laser and the powders"
Amongst others. In fact the whole video could easily be from a SGLB employee discussing what they are contributing! Very encouraging.