Been doing this since 2010, when I first noticed steelers.com posting pictures every year from inside their warroom. Been dialing it in since. And last year they posted a collection of draft day photos from various drafts, with better shots of their board. I'm 100% certain of their positional board layout, as far as which column represents which position. I don't yet understand their grading system, nothing I've ever seen before, but I think I got the jist of it anyways. From that board they sort them onto their master board 1-255 and beyond into UDFA. Tho their positional board usually has around 140-150 prospects they say are draftable, they fill out that masterboard all the way thru, and remove the players from both boards as they are picked. Never really get a good look at that masterboard, but that positional board is good enough. For the most part. Just don't know how they settle ties when they have 4 or 5 guys across different positions with the same grade. Assume by need and fewest risks.
I'm not sure Mosely is ILB2 on their board. ILB3 is redflagged. Can't tell if that's for med or character. Med will have a red '+', and character a red 'O'. But he's the only one that high that I'd think could be flagged, so he's either ILB3 or not on their board.
Turns out Fuller is CB5. That makes Gilbert CB1 on their board. When the Steelers are talking trade with some team prior to Fuller being picked, the CB5 card is still on their board, and Gilbert had already been picked. But when the Steelers are on the clock, that CB5 card is gone, so that makes it Fuller.
Remotely possible Tuitt is DE2 and not their top DE. But for that to be true, pretty much their top 30-35 would have to be completely gutted for Tuitt to be the highest remaining player on their board AND DE2. That would include their top 2 RBs, and none had been picked at that point. Their 2nd highest TE was redflagged. Again, can't tell, but has to be either AS-J or Niklas. AS-J had been picked prior to Tuitt, but Niklas was still on the board. I dunno. It's possible, but I doubt it. Fairly certain Tuitt is their top DE.
Bortles was their 2nd highest QB. That card is gone when the Steelers pick and their top QB remains. Only one QB was taken prior. That's a positive ID on Bortles for QB2 on their board.