Hmm, sure you want to sand it any more? Looks a bit thin as it is.
Maybe if you stuck some of those non skid feet on the bottom it wouldn't move around when you are cutting fruit on it?
What are you going to do for legs? That thing is so heavy it's going to need some Big Girl legs to hold it steady. Maybe a HD table with some drawers or a couple of shelves. Just to let you know, I'm envious.
Why?! Because footballs don't have wheels!
Might this be worth a call to a good carpenter? I wouldn't want to mess up such a nice piece.
But, you can do it!!!
My father build a base cabinet for it years ago that has 1 big drawer for pots and pans or whatever, and brings the block up to counter height.
It also has big holes on the under side for legs from when it was in the butcher's shop.
"God sends meat and the devil sends cooks." - Thomas Deloney
Just lob off the top of it with a chainsaw. You'll be done before you know it!
"The Buddha resides as comfortably in the circuits of a digital computer or the gears of a cycle transmission as he does at the top of a mountain."