Yes, i am. I've had one of the blue medical barrels sitting around for quiet a while ... been meaning to, and saw your thread the other night.
Any idea how much sand you have in there? I've got about 250lbs sitting around, but don't think that would fill much more than the first 12", if at all.
Did you cut the top out?
I'm leaving my top, unless you can give me a reason to take it off.
I am planning on feeding ti through one of the top holes, and draining is through a 2" hole i drilled in the upper side, like it's visible in the pic of your barrel above.