Im going to keep it real. Me personally as a recruit....I was Scaife. I mean same height/ body type as well. I remember Art Kehoe told me at a camp i would be a good center (and i looked down on him, Center was seen like a sucky position to me)...I played Tackle. When i played in college they would at times try to put me at guard as we had alot of length with tackle guys 6'5-6'7 guys. But i was better than them as a tackle. I also wasnt very strong..but i absolutely HATED being put at guard and was uncomfortable there. They figured it out and just left me out wide..being backed up by 6'7 315pd guy...and i was Scaife size.
Being a guard is a mindset thing. Its a phone booth. I worked well at Tackle because i cmae from a basketball background and had great feet and longer arms. I would out thnk the ends, move well..shield them to the outside,e etc. On the inside it isnt the same game. Scaife likely goes through that same feeling.