diff --git a/masque/builder/pather_mixin.py b/masque/builder/pather_mixin.py
index e2c8ca2..477c8aa 100644
--- a/masque/builder/pather_mixin.py
+++ b/masque/builder/pather_mixin.py
@@ -301,8 +301,8 @@ class PatherMixin(metaclass=ABCMeta):
                 self.path_to(portspec_src, None, y=yd, **dst_args)
             else:
                 # S-bend, delegate to implementations
-                tj, _ = port_src.measure_travel(port_dst)
-                self.pathS(*tj, **dst_args)
+                (travel, jog), _ = port_src.measure_travel(port_dst)
+                self.pathS(portspec_src, -travel, jog, **dst_args)
         elif numpy.isclose(angle, 0):
             raise BuildError('Don\'t know how to route a U-bend yet (TODO)!')
         else:
diff --git a/masque/builder/tools.py b/masque/builder/tools.py
index 08aaf4c..bb8a016 100644
--- a/masque/builder/tools.py
+++ b/masque/builder/tools.py
@@ -552,7 +552,7 @@ class AutoTool(Tool, metaclass=ABCMeta):
         if numpy.isclose(jog, 0):
             return numpy.zeros(2)
 
-        sbend_pat_or_tree = sbend.fn(jog)
+        sbend_pat_or_tree = sbend.fn(abs(jog))
         sbpat = sbend_pat_or_tree if isinstance(sbend_pat_or_tree, Pattern) else sbend_pat_or_tree.top_pattern()
         dxy, _ = sbpat[sbend.in_port_name].measure_travel(sbpat[sbend.out_port_name])
         return dxy
@@ -802,15 +802,15 @@ class AutoTool(Tool, metaclass=ABCMeta):
         if data.b_transition:
             pat.plug(data.b_transition.abstract, {port_names[1]: data.b_transition.our_port_name})
         if not numpy.isclose(data.jog_remaining, 0):
-            sbend_pat_or_tree = data.sbend.fn(data.jog_remaining, **(gen_kwargs | data.gen_kwargs))
+            sbend_pat_or_tree = data.sbend.fn(abs(data.jog_remaining), **(gen_kwargs | data.gen_kwargs))
             pmap = {port_names[1]: data.sbend.in_port_name}
             if isinstance(sbend_pat_or_tree, Pattern):
-                pat.plug(sbend_pat_or_tree, pmap, append=True)
+                pat.plug(sbend_pat_or_tree, pmap, append=True, mirrored=data.jog_remaining < 0)
             else:
                 sbend_tree = sbend_pat_or_tree
                 top = sbend_tree.top()
                 sbend_tree.flatten(top)
-                pat.plug(sbend_tree[top], pmap, append=True)
+                pat.plug(sbend_tree[top], pmap, append=True, mirrored=data.jog_remaining < 0)
         if data.out_transition:
             pat.plug(data.out_transition.abstract, {port_names[1]: data.out_transition.our_port_name})
         return tree
@@ -831,7 +831,6 @@ class AutoTool(Tool, metaclass=ABCMeta):
             in_ptype = in_ptype,
             out_ptype = out_ptype,
             )
-
         tree, pat = Library.mktree(SINGLE_USE_PREFIX + 'pathS')
         pat.add_port_pair(names=port_names, ptype='unk' if in_ptype is None else in_ptype)
         self._renderS(data=data, tree=tree, port_names=port_names, gen_kwargs=kwargs)