Along with finishing the stand, I was able to finish most of the plumbing. Today I bonded the PVC together and everything went ok. Next step is getting some flex pipe to connect the return pump to the PVC return - you can see that on the left.
Things look a bit messy with the Controller cords not properly laid out. Will get that cleaned up before I go live.
Next step is rinsing the rock. I can now see the path to wetness!