Its in my sump now. The elbo is just really restricted, very easy to see once you pick it up.
Any sort of bit like this works fine.
http://www.lowes.com/lowes/lkn?actio...952&lpage=none
And any dremel like this will work. You should be able to pick one up for 25ish or as much as you would like to pay. If it has a cord it will be cheap, if its cordless more, but much sweeter!
http://www.lowes.com/lowes/lkn?actio...700&lpage=none