new dro

I've been afraid to ask this question, because I'm sure it displays(pun intended) my ignorance but I've been searching for the answer here for a couple of days and I can't find a clear answer. My searching has lead me to more confusion. So here is the background and hopefully this will give...

I just purchased a Fagor Dro for my Bridgeport and am getting ready to install it. It is 3-axis. As usual, the instructions are very limited. I am seeking some advice on the following: Is there any pitfalls to avoid in installation? I haven't found anything on the scales to tell if they are...