There is a reason why Larry Allen played 3 different positions in the 1900's. Obviously not all 3 could be his "best position", but he had the ability to succeed at multiple positions, so he moved to whichever position would make the overall O-Line the strongest. I'm not saying Collins is Larry Allen's level, but he is versatile, and he his versatility can be beneficial the way it was with Allen. Bottom line for me is you do things in the way that best solidifies the entire O-Line. Creating a huge weak link in order to play Collins in a particular spot would be counter productive.