  We generalise the Missing Partner Mechanism to split the electron-like states
from the coloured ones of vectorlike SU(5) 10-plets without fine-tuning.
Together with the extra light weak doublets from the Double Missing Partner
Mechanism (DMPM), this realises gauge coupling unification in the presence of a
light weak triplet and colour octet, the characteristic light relics from the
adjoint in SU(5) GUT Inflation models. Additionally, we show how the vectorlike
10-plets may generate realistic fermion masses while the DMPM ensures that
dimension five nucleon decay is suppressed. A discovery of the light relic
states at future colliders would provide a "smoking gun" signal of the
scenario.
