My issue with my existing dock has been this:
I have a "box" that I built with just the walls, no bottom, on top of my 55 gallon tank. on my last ATBA I made, it had a floor, which blocked too much light in the aquarium. I built the box that so I could fill the water all the way and have the normal dock in there. But that support bar thing in the middle of my tank limits where I can put the dock. Also when Sheldon is frantically sliding back into the water I am worried he will accidentally clip his shell on that bar! Not good! So I am thinking...
Build a custom island that will sit in the middle of the tank, on top of the bar. It will have a ramp going into the water in both directions. it will turn out looking like stone, I think it will work out really well! Hopefully! lol
I hope that all made sense!! lol
Anyone ever tried this? I am going to start my project on payday! Can't wait!

