diff --git a/fuzzers/031-cmt-mmcm/write_mmcm_reg.py b/fuzzers/031-cmt-mmcm/write_mmcm_reg.py
index 8a8afe1..81fd570 100644
--- a/fuzzers/031-cmt-mmcm/write_mmcm_reg.py
+++ b/fuzzers/031-cmt-mmcm/write_mmcm_reg.py
@@ -171,7 +171,7 @@
     Other features generated in fuzzing are passed through.
 
     """
-    base_offset_register = 'CMT_LOWER_B.MMCME2.CLKOUT5_DIVIDE[1]'
+    base_offset_register = 'CMT_LOWER_B.MMCME2_ADV.CLKOUT5_DIVIDE[1]'
 
     bit_offset = None
     in_use = None
@@ -266,7 +266,7 @@
                             continue
 
                         print(
-                            'CMT_LOWER_B.MMCME2.{}_{}_{}[{}] {}'.format(
+                            'CMT_LOWER_B.MMCME2_ADV.{}_{}_{}[{}] {}'.format(
                                 register_name, layout, field, bit,
                                 reg.next_bit()))
             else:
@@ -279,7 +279,7 @@
                             continue
 
                         print(
-                            'CMT_LOWER_B.MMCME2.{}[{}] {}'.format(
+                            'CMT_LOWER_B.MMCME2_ADV.{}[{}] {}'.format(
                                 field, start_bit + bit, reg.next_bit()))
 
             assert bit_count == 16
@@ -287,11 +287,11 @@
             for bit in range(16):
                 if register_name != layout or layout in ['CLKOUT1', 'CLKOUT2']:
                     print(
-                        'CMT_LOWER_B.MMCME2.{}_{}[{}] {}'.format(
+                        'CMT_LOWER_B.MMCME2_ADV.{}_{}[{}] {}'.format(
                             register_name, layout, bit, reg.next_bit()))
                 else:
                     print(
-                        'CMT_LOWER_B.MMCME2.{}[{}] {}'.format(
+                        'CMT_LOWER_B.MMCME2_ADV.{}[{}] {}'.format(
                             register_name, bit, reg.next_bit()))
 
     parts = in_use.split()
diff --git a/fuzzers/032-cmt-pll/write_pll_reg.py b/fuzzers/032-cmt-pll/write_pll_reg.py
index 749a84d..aeeae4a 100644
--- a/fuzzers/032-cmt-pll/write_pll_reg.py
+++ b/fuzzers/032-cmt-pll/write_pll_reg.py
@@ -151,7 +151,7 @@
     Other features generated in fuzzing are passed through.
 
     """
-    base_offset_register = 'CMT_UPPER_T.PLLE2.CLKOUT5_DIVIDE[1]'
+    base_offset_register = 'CMT_UPPER_T.PLLE2_ADV.CLKOUT5_DIVIDE[1]'
 
     bit_offset = None
     in_use = None
@@ -244,7 +244,7 @@
                             continue
 
                         print(
-                            'CMT_UPPER_T.PLLE2.{}_{}_{}[{}] {}'.format(
+                            'CMT_UPPER_T.PLLE2_ADV.{}_{}_{}[{}] {}'.format(
                                 register_name, layout, field, bit,
                                 reg.next_bit()))
             else:
@@ -257,7 +257,7 @@
                             continue
 
                         print(
-                            'CMT_UPPER_T.PLLE2.{}[{}] {}'.format(
+                            'CMT_UPPER_T.PLLE2_ADV.{}[{}] {}'.format(
                                 field, start_bit + bit, reg.next_bit()))
 
             assert bit_count == 16
@@ -265,11 +265,11 @@
             for bit in range(16):
                 if register_name != layout or layout in ['CLKOUT1', 'CLKOUT2']:
                     print(
-                        'CMT_UPPER_T.PLLE2.{}_{}[{}] {}'.format(
+                        'CMT_UPPER_T.PLLE2_ADV.{}_{}[{}] {}'.format(
                             register_name, layout, bit, reg.next_bit()))
                 else:
                     print(
-                        'CMT_UPPER_T.PLLE2.{}[{}] {}'.format(
+                        'CMT_UPPER_T.PLLE2_ADV.{}[{}] {}'.format(
                             register_name, bit, reg.next_bit()))
 
     parts = in_use.split()
diff --git a/fuzzers/063-gtp-common-conf/generate.py b/fuzzers/063-gtp-common-conf/generate.py
index f7bb4d9..640e4b5 100644
--- a/fuzzers/063-gtp-common-conf/generate.py
+++ b/fuzzers/063-gtp-common-conf/generate.py
@@ -134,7 +134,7 @@
 
             for i in range(2):
                 segmk.add_tile_tag(
-                    tile, "IBUFDS_GTE2.%s[%u]" % (param, i), bitstr[i])
+                    tile, "IBUFDS_GTE2.CLKSWING_CFG[%u]" % (i), bitstr[i])
 
     if tile_type.startswith("GTP_COMMON_MID"):
         bitfilter = bitfilter_gtp_common_mid
diff --git a/prjxray/segmaker.py b/prjxray/segmaker.py
index 2c16282..4d6795f 100644
--- a/prjxray/segmaker.py
+++ b/prjxray/segmaker.py
@@ -283,7 +283,7 @@
                     segment["tags"][tag] = value
 
             def add_site_tags():
-                site_prefix = site.split('_')[0]
+                site_prefix = "_".join(site.split('_')[0:-1])
 
                 def name_slice():
                     '''
@@ -331,7 +331,7 @@
                     'IDELAY': name_y0y1,
                     'ILOGIC': name_y0y1,
                     'OLOGIC': name_y0y1,
-                    'IBUFDS': name_y0y1,
+                    'IBUFDS_GTE2': name_y0y1,
                 }.get(site_prefix, name_default)()
                 self.verbose and print(
                     'site %s w/ %s prefix => tag %s' %