diff --git a/msaexp/slit_combine.py b/msaexp/slit_combine.py
index 44792ed..afb7998 100644
--- a/msaexp/slit_combine.py
+++ b/msaexp/slit_combine.py
@@ -537,7 +537,7 @@ def __init__(
         fixed_offset=0.0,
         nod_offset=None,
         pad_border=2,
-        weight_type="ivm_bar",
+        weight_type="ivm",
         reference_exposure="auto",
         **kwargs,
     ):
@@ -778,8 +778,6 @@ def __init__(
         self.info = self.parse_metadata()
         self.calculate_slices()
 
-        self.sh = np.min(np.array(self.shapes), axis=0)
-
         self.parse_data()
 
         if self.grating.startswith("G"):
@@ -1127,7 +1125,8 @@ def calculate_slices(self):
         xstart = np.max(self.info["xstart"])
         xstop = np.min(self.info["xstart"] + self.info["shape"][:, 1])
 
-        sh = (ystop - ystart, xstop - xstart)
+        # Global shape
+        self.sh = (ystop - ystart, xstop - xstart)
 
         y0 = ystart - self.info["ystart"]
         x0 = xstart - self.info["xstart"]
@@ -1291,6 +1290,14 @@ def parse_data(self):
 
         bad = (dq & BAD_PIXEL_FLAG) > 0
 
+        # Extra bad pix
+        for i, slit in enumerate(slits):
+            sl = slit.slice
+            dqi, dqf = msautils.extra_slit_dq_flags(
+                slit, verbose=(VERBOSE_LOG > 1)
+            )
+            bad[i, :] |= dqi.flatten() > 0
+
         # Dilate stuck open pixels
         if ("MSA_FAILED_OPEN" in BAD_PIXEL_NAMES) & self.meta[
             "dilate_failed_open"