Between 11 and 24 March the Assembly, integration, verification and commissioning of the upgraded InfraRed Low-Order wavefront Sensor of MUSE, IRLOS, was carried out through an efficient collaboration between the local Paranal team and the remote support team in Garching. The goal of the upgrade, which uses a new SAPHIRA detector with sub-electron readout noise, is to add at least two magnitudes to the limit for the wavefront sensing while simultaneously increasing the correction rate to 500 Hz. The 500Hz SmallScale mode of the new IRLOS system is in operations with a fully automated acquisition since the beginning of Period 107 with a limiting magnitude of J=17.0 for point sources. This fainter magnitude limit is offered for P108 and proposals submitted during P107. Prior to this commissioning MUSE Narrow Field Mode could use as AO reference stars brighter than H=14.5, with the sensing done at a fixed 200Hz with field-selector scales for point-sources, SmallScale, and extended objects, LargeScale.