diff --git a/interp/grid/__init__.py b/interp/grid/__init__.py
index 8879e1b..a935cba 100644
--- a/interp/grid/__init__.py
+++ b/interp/grid/__init__.py
@@ -1,22 +1,19 @@
 import sys
 import re
 from   collections import defaultdict
-import inspect
 
 import numpy as np
-import scipy.spatial
+from scipy.spatial import KDTree
 
 from interp.baker import run_baker
 from interp.tools import log
-from simplex      import cell, contains
-from smcqdelaunay import *
+from interp.grid.simplex      import cell, contains
+from interp.grid.smcqdelaunay import *
 
 
 class grid(object):
   def __init__(self, verts = None, q = None):
     """
-      this thing eats two pre-constructed arrays of floats:
-
       verts = array of arrays (if passed in, will convert to numpy.array)
               [
                 [x0,y0],
@@ -28,7 +25,7 @@ class grid(object):
 
     if verts:
       self.verts = np.array(verts)
-      self.tree           = scipy.spatial.KDTree(self.verts)
+      self.tree           = KDTree(self.verts)
     if q:
       self.q = np.array(q)
 
@@ -218,7 +215,6 @@ class delaunay_grid(grid):
 
       S is S_j from baker's paper : some verts from all point that are not the simplex
     """
-    log.debug(inspect.stack()[1][3])
     log.debug("extra verts: %d" % extra_points)
     log.debug("simplex size: %d" % simplex_size)
 
@@ -313,7 +309,7 @@ class delaunay_grid(grid):
     log.debug('start')
     qdelaunay_string = get_qdelaunay_dump_str(self)
     cell_to_cells = []
-    for matcher in grid.cell_re.finditer(qdelaunay_string):
+    for matcher in delaunay_grid.cell_re.finditer(qdelaunay_string):
       d = matcher.groupdict()
 
       cell_name          = d['cell']