  In the linear moose framework, which naturally emerges in deconstruction
models, we discuss the effect of direct couplings between the left-handed
fermions living on the boundary of the chain and the gauge fields in the
internal sites. This is realized by means of a product of nonlinear sigma-model
scalar fields which, in the continuum limit, is equivalent to a Wilson line.
The effect of these new nonlocal couplings is a contribution to the S parameter
which can be of opposite sign with respect to the one coming from the gauge
fields along the string. Therefore, with some fine-tuning, it is possible to
satisfy the constraints from the electro-weak data without spoiling the
perturbative unitarity limit, which, in these models is generally postponed
with respect to the Higgsless Standard Model one.
