A search query portion is received. The forward shaft intersects the first stage turbine disk at a non-perpendicular angle in the area of the disk hub for directing sufficient hot air against the disk hub to balance the thermal response rate of the disk hub to the thermal expansion rate of the forward outer seal. The rebates are \u201cperformance based\u201d in that the earlier a buyer pays off its account with a supplier, the larger the rebate.