Here's the left island drilled and acrylic rod inserted. Even though I will be going with sand this time around, I am still using putty on the bottom to secure the rocks in place and the ones that are toward the back of the tank are held together with a combination of putty and super glue gel on both sides of the bond between rock and glass. and yes the acrylic rod will be covered with a smaller piece of live rock that will be glued in place.