I think that matching numbers make it clear that the metal parts began life as a set. That's what's cool about the kits. From my perspective, "cobbled" referred to a furniture set that is not common to the md86 rifle, but has appeared on other Romanian export firearms.
I'd be on these kits like a rash (and grateful for the opportunity) if I hadn't invested in the earlier batch. That said, I wouldn't use the black furniture set unless rifles were actually built and sold by contract in that configuration, but that's just my collecting perspective.
One of these would be great for building a fixed stock Romy 545 with blonde Romy laminate (or solid) palmswell and buttstock, a known export configuration for this rifle. Need to go through my Romy wood box to see if there's something suitable.