  Several methods have been proposed in the literature to improve Free Electron
Laser output by transforming the electron phase-space before entering the FEL
interaction region. By utilising `beam by design' with novel undulators and
other beam changing elements, the operating capability of FELs may be further
usefully extended. This paper introduces two new such methods to improve output
from electron pulses with large energy spreads and the results of simulations
of these methods in the 1D limit are presented. Both methods predict orders of
magnitude improvements to output radiation powers.
