Reconstructed αλ values for each of the systems in Table 1 assuming that the first phase of mass transfer was a common envelope, for a set of different values of initial masses and metallicity as well as different WD masses following the uncertainties in the derived masses. The numbers on the right show the fraction of solutions that falls in the 0-2 range and the 0-20 range respectively. Systems that have less than 10% solutions in the 0-20 range are coloured red, ones that have less than 10% solutions in the 0-2 range yellow, the others black.