  A model for the dressed quark-gluon vertex, at zero gluon momentum, is formed
from a nonperturbative extension of the two Feynman diagrams that contribute at
1-loop in perturbation theory. The required input is an existing ladder-rainbow
model Bethe-Salpeter kernel from an approach based on the Dyson-Schwinger
equations; no new parameters are introduced. The model includes an Ansatz for
the triple-gluon vertex. Two of the three vertex amplitudes from the model
provide a point-wise description of the recent quenched lattice-QCD data. An
estimate of the effects of quenching is made.
