SM top contribution, and can result in $T$ large and negative, in conflict with the electroweak fit [@lepewwg]. To ameliorate this new concern, the freedom to consider $Q_3$ closer to the IR boundary (compensated by moving $t_R$ somewhat away from it) is crucial, allowing $c_{Q_{3L}} \sim 0.2$, $c_{t_R} \sim -0.49$, and $c_{f} \lesssim -0.5$, for which the couplings to the first KK mode of the gluon are approximately $g_f \sim -g_S /5$, $g_{t} \sim 0.07 g_S$, and $g_{Q3} \sim 2.76 g_S$.

This model generically leads to very light KK quarks, the lightest of which are the $SO(5)$ bi-doublet partners of the right-handed up-type quarks of the first two generations $u_i$ (by virtue of the choice of $c$ for the two light generations) [@Carena:2007ua]. Each generation contains $$\begin{aligned}
\begin{array}{c}
\begin{array}{ccccccc}
~ & ~ & Q^{i}_{2R} &=& \begin{pmatrix}
\chi^{u_{i}}_{2R}(+,-) & q^{\prime {u_{i}}}_R(+,-) \\
\chi^{d_{i}}_{2R}(+,-) & q^{\prime {d_{i}}}_R(+,-) \end{pmatrix},
\end{array}
\end{array}
\label{multiplets}\end{aligned}$$ along with their $(-,+)$ left-handed Dirac partners. The $(\pm,\,\mp)$ refers to their boundary conditions on the (UV, IR) boundaries, and do not lead to zero modes (as desired), and modify the equation which determines their masses and admixture of Bessel functions. For the right-handed $(+,-)$ states this leads to, $$\begin{aligned}
\beta_n 