The Oline needs changes.
Here would be what I would try:
Move Havenstein to LT.
Move Saffold to RT.
Move GRob to LG.
Here's why: Havenstein is a natural OT. He is not all that athletic, but I think technique and his length will help him on the Left side. He is Mr. Steady.
Saffold played a lot of RT in preseason, and played OT earlier in his career. He can handle it.
I just don't see GRob as being a very good LT. I'm beginning to doubt his IQ. I see so many mental mistakes. But he has enough experience to move to OG and I think his strong suit, which is moving people, will work better. Being on an island at LT is probably not going to be his place in the league.