I insure you, I am mistaken.
I MEANT to say 49, but I probably read the comment about 51 being Bo's afterward and got them confused. And I remembered most tiles vertically adjacent had a difference of 10, so I took a guess at what was below 51.
So, correction: I got dibs on 49.
And MetalFox, if I do get 49 can I alter that wall in 57 (er, that's the one below it, right?).