More Stonework...

The stonework doesn't have to be perfect.  Real stone work isn't.   As you can see, when I do it, I do it on a dark background.  '

This floor is on black foam core.  If you don't have that, I recommend that you paint your floor charcoal or black.

When you paint it, the cracks will all but disappear anyway.

 Giac asked if I had to weight it.  Not very often.

I don't try to cover the whole back.  If the whole back is covered, it is more likely to warp and thus need weighting.

I just squirt a zigzag pattern of Elmer's Glue All or Aileen's Tacky.  I am using Elmer's for this floor.

 The stone to the left is the one that I just put the glue on.  It is laying perfectly flat.

Here you see a place that I did have to weight. 

I decided that the ones over the opening should stop at the bottom edge.  Less likely to get caught when pulling out the bed.

The ones on the front curve didn't get weighted, but the ones under and behind the glue bottles needed it because the two sections of the bend were of unequal length.

In that case the longer side will try to flip up. 
It only takes about five minutes of the bottles on that section to make it right.

I usually cut my pieces as I go along, by eye. However, I have been doing this for 30 years and kind of know how to do it now.

If it is your first time, I would suggest that you look on line for a floor that you like and draw some guidelines directly on the tray.

This will give you something to go by. Good luck!

Tomorrow, painting... See you then.