I think we need to quite worrying about d-back and focus on the offensive line. Here is the depth chart. 
 
left tackle-Smith, Bauer 
left guard-Braegelmann, Soll 
center-Hendrickson, Storhaug 
right guard-Kuper, Doescher 
right tackle-Hoffelt, Bronson 
 
The only experience is Smith and Kuper. Kuper may be a pre-season all-american but pre-season doesn't mean anything. The young guys may be able to get by on size and speed against some of the weaker opponents (Mankato) but they will need some experience to anchor them against tough teams like Omaha and from what I hear Smith is a soft spoken guy. Are the young guys, Braegelmann and Hoffelt, really ready to assume the starting roll?? Then what if there is an injury, the depth chart is not exactly deep.