diff --git a/daq/src/aaredaq/daq.py b/daq/src/aaredaq/daq.py
index ce423d19..2ce44e17 100644
--- a/daq/src/aaredaq/daq.py
+++ b/daq/src/aaredaq/daq.py
@@ -370,6 +370,7 @@ class AareDAQ:
             grid.n_x = 1
             grid.n_y = 100
             grid.file_prefix = f"{old_prefix}_{grid.omega_deg}deg"
+            grid.grid_size_mm = Coordinate(x=geom.beam_size_mm.x * 0.8, y=geom.beam_size_mm.y * 0.2)
             offset = Coordinate(x=0, y=-grid.n_y * grid.grid_size_mm.y / 2.0)
             geom = self.sample_geometry
             grid.smargon.sh_mm = geom.smargon.sh_mm + geom.smargon_nudge(offset)