I am puttin in a corner tub in the basement where a shower used to be. The drain on the tub doesn't match where the drain in the floor. We are okay with raising the tub so I need to know if its okay to run an extension under the tub over to the drain. Is there anything I need to be aware of if I do this?

I personally have done this. It is not the best way and can have problems later, but it will work.