Edit: a more detailed suggestion was posted by Chalpy here

OK, I realize that this has not been released and that the info we so far may be incomplete - inaccurate; but what I'm reading concerns me.

Reading this, it seems that augment kits needed to add augment slots to crafted gear will be created only through Armstech, Armormech and Synthweaving.

I think what would make sense is that every craft could create an augment kit usable to add an augment slot on any gear that the craft can make. E.G. to add an augment slot on a lightsaber/relic - you'd need an artificers augment kit.

An alternative that could help to economy would be that every crafter can create an augment kit only for someone else (e.g. artificer for armstech, armstech for synthweaver, etc.) so that if an artificer wanted to create gear with an augment slot he'd need to buy/trace with an armstech, etc.