The 5 micron mini-quad collimator assembly has been modified to replace the 300 micron scatter guard with a 50 micron beam-defining pinhole and is available for use. The new suite of pinhole sizes in this assembly is 50, 20, 10 and 5 microns. At this time the default assembly will be the 300, 50, 20, 10 micron pinhole set. Please notify staff prior to your experiment if you prefer to use the 5 micron set so that we can make the switch at start-up.