I still think the effect to payback days is being overblown. The vast majority of greenslips are trips that come uncovered within 48 hours of report. They can't go out as silver slips. Silver slips and the 150% PBS trips seem more like a workaround to the company's desire to allow more unstacking. This is their way of covering trips over exceptional peaks like Thanksgiving and Christmas that they've had trouble with over the last few years. They'll inevitably reduce PB days to some extent, but I'd bet we're talking low single digits.