I created a pretty big machine, it works. It forms. But in when looking in JEI to see how to build the machine. I get some weird effect. It seems to see what each block is on normal or smaller machines, But this bigger one doesnt show properly. for instant you hover over block A and it displays the name for block B.
hard to tell since the screen cap doesnt get the curser but, im hover over the center block with a fluid router from IM
then on the second, im hovering over a item output (or something like that) and it displays the name of the center most block.