Good points. I think Denver was probably the best example of downsized linemen for a time. Alex Gibbs and Shanahan ran that zone blocking scheme with typically undersized guys. Of course, it helped that the undersized guys were Gary Zimmerman, Mark Schlereth, and Tom Nalen. And that they were blocking for John Elway and Terrell Davis. But the chop blocks down low were outlawed, making it very difficult to run block with smaller guys, so the big plow horse is once again the norm. But at tackle, you have to have big plow horses with nimble dance moves. There aren’t enough of those guys to go around.