The Detroit Lions On SI staff examines how well Penei Sewell will transition to left tackle. 1. What position should Lions target with remaining open roster spots? Christian Booher : I think the Lions are still missing a nose tackle to round out their defensive line. They're going to utilize Tyleik Williams plenty, and he can play that spot, but he'll be best in a rotation. I think a veteran add in this spot would help finalize what has been a solid offseason, and I mentioned Cincinnati's T.J. Slaton as a player I think Detroit should try to make a move for earlier this week. On the offensive side of the ball, I think the Lions are in good shape. If an intriguing running back with the potential to compete for the backup job becomes available, maybe that's an area the Lions look to. I could also see the team adding a big-bodied wideout if they want to have some competition for Isaac TeSlaa.…