diff --git a/openlane/chip_io/config.tcl b/openlane/chip_io/config.tcl
index dba3bbc..30898c6 100755
--- a/openlane/chip_io/config.tcl
+++ b/openlane/chip_io/config.tcl
@@ -26,7 +26,7 @@
 set ::env(MAGIC_WRITE_FULL_LEF) 1
 
 set ::env(DIODE_INSERTION_STRATEGY) 0
-set ::env(GLB_RT_TILES) 12
+set ::env(GLB_RT_TILES) 30
 set ::env(GLB_RT_UNIDIRECTIONAL) 0
 # set ::env(GLB_RT_ALLOW_CONGESTION) 1
 # set ::env(GLB_RT_OVERFLOW_ITERS) 150
diff --git a/openlane/chip_io/interactive.tcl b/openlane/chip_io/interactive.tcl
index 8e5de2e..55c0f00 100755
--- a/openlane/chip_io/interactive.tcl
+++ b/openlane/chip_io/interactive.tcl
@@ -52,6 +52,17 @@
 	-fixed 1 \
 	-layerNames "met1 met2 met3 met4 met5"
 
+add_macro_obs \
+	-defFile $::env(CURRENT_DEF) \
+	-lefFile $::env(MERGED_LEF_UNPADDED) \
+	-obstruction gpio_m3_pins \
+	-placementX 469.965 \
+	-placementY 4972.585 \
+	-sizeWidth 1149.480 \
+	-sizeHeight 16.200 \
+	-fixed 1 \
+	-layerNames "met3"
+
 li1_hack_start
 global_routing
 detailed_routing