Here are a couple of pictures of the strips. These are poly glued and air-nailed with 1.5 inch nails. I used a little marking fixture to mark the bottom of the strips all the way around before trying to mount them.
When I mounted the shelves on the strips (tapped it in place with a mallet), I had the unexpected result of having them stay up on their own. Once I put the 45 degree corner peice in place, it became very solid.
I had to basically build the corner piece in place, buy marking, cutting, then hand planing the pieces to fit. If everything were perfect, the piece would have 22.5 degree sides. In this case, they ended up being 21 on one site and 24.5 on the other. It takes a little while to get a good fit, but having tight joints is worth it.
Here are the shelves installed - I still need to put the front trim strip on, which will be dadoed to help provide good support, and allow me to blind nail it.
I have some cast iron 90 degree brackes I will put on top the shelves to reinforce them, and add some decoration.
Here is a picture of the kitchen - getting close to complete.