Carson & Associates is reassuring. QMC was "not surprised" by the RoHS Cad Free. They have been working on the best "chemistry" to alleviate this problem with Nitto and others. The whole industry is doing the same.
As far as cad-free concerned why are you pointing only QMC? It's not QMC but QDVision who was surprised. QMC is the only company publicly confirmed they have cad free apart from Nano.