I think we'll see these 5 as the starting unit: Whitworth, Corbett, Blythe, Havenstein and Evans. Other than for Whitworth at LT and Blythe at C, I could see Corbett as one of the Guards, and Havenstein and Evans representing the remaining G and ROT. I don't know which might be which.
Evans represented himself so well last year, that to me, he might be most suited to ROT.
I think Havenstein is probably going to be the OG, likely on the Right side because of the footwork. I know they tried him at OG and another guy (can't remember who) at OT and decided against it, but as I recall the issue was that they lost too much at ROT without Havenstein there.
I go with Corbett over Edwards as starting at one Guard because I see a bit more interior Oline qualities in him, with Edwards more as an OT type. But, who knows after an off season of weight training and another Training Camp.