Clusters extracted by OPTICS using the unperturbed mean phase-space positions are shown in black; In red the clusters extracted by FOPTICS using realistic Gaia uncertainities (test case scenario one) and the clusters extracted by FOPTICS using five times the Gaia errors (test case scenario two) in blue. It can be seen that the two streams detected in the data set (blue), using five times that Gaia errors, only the densest portion of the stream were detected with a decreased number points in the tails and therefore a decrease in size. Furthermore, the stream at approximately –15 deg is completely lost when the uncertainties are increased.