  By combining some ideas of Lubinsky with some soft analysis, we prove that
universality and clock behavior of zeros for OPRL in the a.c. spectral region
is implied by convergence of $\frac{1}{n} K_n(x,x)$ for the diagonal CD kernel
and boundedness of the analog associated to second kind polynomials. We then
show that these hypotheses are always valid for ergodic Jacobi matrices with
a.c. spectrum and prove that the limit of $\frac{1}{n} K_n(x,x)$ is
$\rho_\infty(x)/w(x)$ where $\rho_\infty$ is the density of zeros and $w$ is
the a.c. weight of the spectral measure.
