Beth: Yes, I probably could have beheaded him; however, there would be no guarantees that it wouldn't regenerate or split. The other disadvantage would be an enormous animal decomposing in the tank if it did die. On a side note: as I posted, When trying to get him out of the pvc tubing (which took over an hour, even with the whole thing on the garage floor...he tightly filled that tube) I accidently broke an 18 inch section of his tail off. That tail was still swimming around in the bucket 3 days later......so, I would say the only way to guarantee his total removal was to do what I did.
Trompet, The platforms were pretty simple. It was just utilizing 3/4 inch pvc pipe and fittings to construct a rectangular box that would elevate the rock structure above it about 4 inches off the bottom. A piece of eggcrate was fastened to the pvc box with plastic zip ties. The rocks have no trouble sitting on the eggcrate..it's very stable once you get all the rocks in.