super update Paul, and now with the 2" drains, you don't have to worry about a failure do to a clog etc.
Good feedback on the stand pipes. You have made great progress and I am really glad you ripped out yhe old stand and built in this new "L" shaped one. It gives you a lot more flexibility and room to grow. It seems to me that your RO/DI and SW mixing are just about identical to mine, but I am concerned that you may not have enough capacity. I built mine around 96g bins and will be upgrading to 200g bins so I can have more water on hand. I just find that I am operating to close to the edge when it comes to emergency situations.