Yeah, sure. I think the primary driver is... Let me step back. You know, this docket has been open for a multitude of years. If we had approvals and had the green light to move forward with that, the cost-benefit analysis would have been much, much stronger and positive. But because we haven't been able to get to a mutual place where we would feel comfortable in making the investment without having the assurance that we have recovery, we haven't done so. And we have updated the analysis and the costs have gone significantly higher. So the benefits really haven't changed, now the cost component has changed and that's why we're really close. Over time we think it's the right thing to do and we'll give customers the tools that they need to manage their energy consumption, and we think that that brings a lot of value to the table.