diff --git a/fuzzers/machxo3d/022-glb-cib_ebr/4300/fuzzer.py b/fuzzers/machxo3d/022-glb-cib_ebr/4300/fuzzer.py
index bee1050b..91f0ca3d 100644
--- a/fuzzers/machxo3d/022-glb-cib_ebr/4300/fuzzer.py
+++ b/fuzzers/machxo3d/022-glb-cib_ebr/4300/fuzzer.py
@@ -10,7 +10,7 @@ def mk_nets(tilepos, glb_ids):
 
     # Up/Down conns
     ud_nets.extend(net_product(
-        net_product(["R4C{}_VPTX0{{}}00", "R15C{}_VPTX0{{}}00"], [tilepos[1]]),
+        net_product(["R6C{}_VPTX0{{}}00", "R16C{}_VPTX0{{}}00"], [tilepos[1]]),
         glb_ids))
 
     # Phantom DCCs- First fill in "T"/"B", and then global id
diff --git a/fuzzers/machxo3d/022-glb-cib_ebr/9400/fuzzer.py b/fuzzers/machxo3d/022-glb-cib_ebr/9400/fuzzer.py
index f98b3056..31218b44 100644
--- a/fuzzers/machxo3d/022-glb-cib_ebr/9400/fuzzer.py
+++ b/fuzzers/machxo3d/022-glb-cib_ebr/9400/fuzzer.py
@@ -10,7 +10,7 @@ def mk_nets(tilepos, glb_ids):
 
     # Up/Down conns
     ud_nets.extend(net_product(
-        net_product(["R13C{}_VPTX0{{}}00", "R17C{}_VPTX0{{}}00"], [tilepos[1]]),
+        net_product(["R5C{}_VPTX0{{}}00", "R12C{}_VPTX0{{}}00", "R19C{}_VPTX0{{}}00", "R26C{}_VPTX0{{}}00"], [tilepos[1]]),
         glb_ids))
 
     # Phantom DCCs- First fill in "T"/"B", and then global id