Bob, whose "Frank" that you were directing your comments to? I believe his name is actually "Don"....
While the expanding width fuse is the "in thing" with fuses right now, I wonder if it really is making that much of a difference, since we have that big hunk of draggy aluminum hanging on to the front of a 2.25" square firewall. No wood airplane has ever turned the times of my QuikV5 from back in 1999, and while the fuse did coke bottle towards the rear, the widest point was at about the 1/3 point of the wing. Very few people have gone as fast with composite airplanes to this day. I don't believe anybody's actually done any real measured analysis directly comparing the two different fuse types, with absolutly no other factors that could make a difference.
GS