What exactly are the two different form factors?1. Midboard Field Enhancers (For most Proxmark 3 Easys)These Replace your entire mid-board of the PM3 Easy.  Installation is slightly more involved. Remove the LF antenna on top with 4 screws.  Remove the 4 Posts that the LF antenna rested onRemove the remaining 2 lower screws of the midboard.Fling your old useless midboard across the room for distanceAdd the new MWG Midboard in place with your favored silkscreen design facing up.Replace the two lower screwsReplace the 4 upper postsReplace the LF Antenna with 4 screws careful to note the arrows on the antenna screw posts pointing to the lower 2 posts.Rejoice2. Back Plane Field Enhancers (Ideal for Proxmark 3 X)Imagine these like adding a bit more junk in the PM3 Easy’s Trunk.  You add these to the bottom of the PM3 Easy with the 4 included Screw posts and it just works!  See increased range and readability in minutes of time!Incompatible Proxmark 3 Easy IdentifierThere are a handful of Proxmark 3 Easy’s in the wild that are incompatible with both the Midboard and Backplane boards.  The best way to identify it is by looking at the right side of the Mid-board on the stock PM3.  If the text that says “Power” is Above the right most screw post hole, it is NOT compatible.  Refer to the wonderfully photoshopped picture to ensure you have the proper variant.