If anyone can do it, I bet sidehack could figure out what would be the best way to encase a single blade, an issue would be controllers though if Bitmain isn't involved.
So is the S7 board size so different that it would not fit in an S5?
Maybe Bitmain could offer an upgrade package?
Hmm It looks like it three hashboards for an S7, so I think this case is the same size as the S5+ center unit. I am not sure how it compares to the S5 standard case, I think Bitmain has decided against board upgrades since they never released the S2 - S4 and never did an S3 - S5.