Frogwag,
Looks good. Nice to see you incorporating the different build techniques with this. Just a hint on the water feature. Make sure it flows where you want it to before final setup. I've run into issues with seepage going to places I did not want that wet. I'd recommend running it to fine tune the flow. I use gorilla glue to alter any location I need to adjust the water flow. When it hardens you can cut it with a sharp knife and cover the hard glue with silicone and peat or coconut fiber.