Thanks Valderi.
Sorry for the lack of pictures. Have been swamped with work getting new catalogues made, business cards and marketing material for winter here.
This week end will definitely take some more of the sump and tank. It has settled nicely but all the long filamentous algae has broken off and in now just a nice thick covering on about 25% of the visible rock surface and has started spreading nicely to the other rocks.
I also added 6 yellow labs but they are all but lost in all that rockwork and somewhat terrified of Ted (for now).
Arodini-The stand was made by a professional joiner. The legs, 8 of them are solid 8" x 4", there are are 2" x 4" struts every foot under the tank with 2 1/2" inch plywood base. The joiner built it to hold at least 3.5 tons (3500kg or 7700lbs). Fully loaded now (including Ted's fat fishy butt) is about 1.5 tons. About 40% of what it is designed to hold.
I do appreciate all your concerns and have read and taken what you have said into consideration. I have decided to stick with the risk as I feel I have taken the necessary precautions to avoid serious problems (watch this space as I may have to eat the whole humble pie a little ways down the line.) I took 2 hours to place 12 rocks in such a way that even when I shake the tank and it rocks the rockwork remained stable and nothing moved.