I am in need of a QC and calibrator but until I do not received any concrete hrlp from them. before ai purchased the hrma machine I wast told that they Endure as their lical counterpart but when I went to their office they do not carry a Durui anymore. I asked another supplier , they given me the address and fontact number but no one answered. I has bern 1 month or 2 months since ai bought it but has not been used because we need control for quality assurance.