I've started with the supporting boards while checking around for some more plywood. You can see the extension to the transition I added. I also decided to let the coping I found yesterday set the width of the quarter. Might be a bit to high for the width... Well we'll see later on if I have to shorten the sides even more. Anyhow, it'll certainly save me some plywood. This photo was taken mid day yesterday, I've added some more boards since.
