This one's for Margreet: the reverse side of the spotted cloth. Click to enlarge.
What appears to be very long weft floats on the reverse side is just a trick of the lighting.
The granite weave ground has 13 risers out of 20 on the face of the cloth, so with the dark warp and pale weft, this ground looks darker on the face and lighter on the reverse. The satin spots behave as you would expect—weft satin light on the face, warp satin dark on the reverse. Such fun to play with these and swap them around!