The few-cycle NIR pulses reflected by the 75:25 beamsplitter are delayed relative to the XUV pulse train by a piezo-electric stage (P-622 with E509 controller, Physik Instrumente (PI)) and then split into two distinct NIR arms by a 50:50 beamsplitter. Two spherical mirrors (f = 1 m) direct each of the split beams into the vacuum chamber to positions above and below a 3 mm hole in the annular mirror through which the XUV pulse train passes. The focused upper and lower NIR beams intersect with the XUV in the target cell at angles of approximately 18 mrad (1.0). To ensure that the NIR pulses arrive at the target simultaneously, the pathlength of the lower NIR arm is adjusted with a second piezo-electric stage. Temporal and spatial overlap between the XUV and NIR arms is determined via second harmonic generation in a BBO crystal. Specifically, the Al foil that blocks the co-propagating NIR after HHG is removed and a mirror is inserted after the annular mirror, steering all three beams out of the vacuum chamber to a BBO crystal located at the focus of the NIR driver. At overlap, second harmonic signals emit at phase-matching angles intermediate between each of the noncollinear NIR beams.