constructed as: $${g^{(2)}}(q,\tau) = \frac{\left<I_{Bt}I_{Gt} {g^{(2)}}_t(q,\tau)\right>}
{\left<I_{Bt}\right> \left<I_{Gt}\right>}\;.$$ For longer times ($\tau > 1$ s), echo DLS was used. Details will be given elsewhere [@echoDLS]. It essentially involves ensemble averaging by rotating the sample continuously at a constant speed and correlating the intensities at a small range of delay times around exact multiples, $\tau \approx nT$, of the rotation period, $T$, where the correlation function shows ‘echo’ peaks. The rotation decorrelates the ICF very quickly at small $\tau$. However, after a whole number of revolutions, the sample comes back to the same orientation and the ICF recovers to a value that is dependent only on the dynamics of the particles in the sample over that period of time. This gives rise to peaks in the ICF at $\tau=nT$. The maxima of these peaks follow the ensemble-averaged dynamics of the sample because the obtained ICF is an average over thousands of independent speckles per revolution. We also correct for imperfections in the rotation using the area under each echo instead of the echo maximum [@echoDLS]. The corrected ICF at $\tau_n = nT$ was calculated from the measured ICF ${g^{(2)}}_m(q,\tau)$ as: $${g^{(2)}}(q,\tau_n) = \frac{A(\tau_n)}{A(\tau_0)}\left[{g^{(2)}}_m(q,0)-1\right] + 1\;,$$ where $A(\tau_n)$ is the area under 