I did not catch that this was an old thread. From what I'm seeing I can get a new 1000MHZ certifier with an LED MM fiber tester for a few thousand less than a new DTX1800. Going to keep looking around on the used/ refurbish market, but feel new would be the better value. They also show that you field calibrate it using the patch cords you plan on using.I like the idea as the clips on my old ProXL are broke off so they can slip out of the jacks.

Do the job right the first time.