A few points:
Adding the Cortosis quality to armor for no credit cost is too powerful. I also don’t think it should require the Cortosis quality. If we’re looking at this tree as a contemporary of Forgemaster and Death Watch Warrior (which could just be renamed “Jetpack Warrior”), it would need to be on a comparable power scale and not be the obvious choice as a better tree.
Since I found these forums, I’ve been slowly picking things from the Mando Source book to add as I do this. I think I’ll go ahead and simply make the Beskar Forging a legitimate -no talent attached- attachment, and we can put something else in Beskar Forging’s place