Different checks can give different answers
RC-WM-101 has a documented successor to RC-WM-119. MC120NM has a documented RF399B system pair. Rio 4.0 v1 and v2 have an explicit revision conflict. Each result needs its own exact identifiers.
We can identify many parts, but not all have a documented replacement. An Unknown result means we need more evidence; don’t order a similar-looking part to fill the gap.




