Reshaping the Bears offensive line has become a matter of flexibility for most members of the group. The next step to getting Justin Fields more help this season is the lineman or linemen they bring in during the draft, and then figuring out how they all fit. They’ve pretty much finished with the receivers who will start, whether at wideout or tight end, and running back additions would be relegated to backups in the draft after signing free agent guard Nate Davis. The line’s makeup looks to be drastically different, regardless, because starting center Sam Mustipher hasn’t been tendered an…