Ok, so I get that it'll increase mechanicus unrest by .5 which is potentially problematic for after this conference, but Corvax is going to flipping love the stuff. In fact, most polities dealing with orks, (basically all of them) are going to love the stuff due to how effective stealth tech can be against orks, specifically its ability to help get a strike force to a warboss to kill them. Also, just contacting the forge-empire of calamus is going to decrease unrest isn't it? Especially with the potential for getting STCs for larger forge complexes and potentially for a Forge World which, to the best of my admittedly incomplete knowledge, we don't have. Those are going to be major boons for our Progressive faction and turn down some mechanicus unrest.
Separate issue, are we mentioning to Calamus that we have a man of stone stc?