Bounceonland, to find the figures simply go into the power charts and use a high temp, such as 46C to get a takeoff Tq.
Then go into the Take Off Distances charts and get the TODR at that temperature and check your MTOW. If the weight is restricted, check at a lower temp. until you get a suitable MTOW, then apply that temp to the Tq chart.
Works very well for the PW 123 engines - up to an 8% reduction is the norm. It only gets difficult if there is an obstacle in the after take-off flight path.