I'm looking at getting another nvd and was wondering about the FLIR pvs-22. I've always bought my nvd stuff from Tnvc because of their quality tubes, but if the pvs-22 is made by FLIR does it matter where I buy it from? Would the quality be the same? Or do some companies put different quality tubes in them like the pvs-14's?

Also how does the Tnvc bns compared to the FLIR pvs-22 stack up tube wise?