Thanks!
And yeah, I went temporarily brain dead conjugating 済ませる as a godan.
As far as 済ませる vs 済ます, I don't quite get what you mean by that they have the same meaning. Is 済ませる a seperate (but equal) verb to 済ます, or the potential form of 済ます, or both? Or to ask another way, is 済ませられます the potential of 済ませる, or the potential passive of 済ます?