Blocked at every turn

Thinking to set one of the new front windows into the frame in place of the board, I unwrapped it and cleared out what remained of the old top sash - only to find that the sill has warped a little, and the right edge of the window is about 1/8" too big to fit into the frame. So I'll have to plane the sill down to get that window in. Disappointing, but I'm still pumped about how nice it's going to look.