If you are doing an EVA foam build then I'm pretty sure that it's a good idea to take off the tabs you can do so by: Clicking on the 2d menu then click show flaps which should uncheck it. And when you print the printer will usually ask you, some part of the development might not fit, and then it says something about auto re scale. You have two options(well 3 but no) The first is to click either no or yes then immediately click cancel, then move around the pieces, or click no, but some of the tabs might be missing.
HaloGoddess also has a good scaling tutorial but be careful because the reach armor is not the same, so you might want to pull up a reference image.:
HaloGoddess' "How To Scale" and More Tutorial