Revised the POR layout, which includes making use of the updated parameterized
PDK cells with vias to metal1 included.  This changed the hash name of the
cells and so left behind a number of unreferenced cells, which have been deleted.
diff --git a/mag/simple_por.mag b/mag/simple_por.mag
index e7fb76c..7fa35e0 100644
--- a/mag/simple_por.mag
+++ b/mag/simple_por.mag
@@ -1,14 +1,23 @@
 magic
 tech sky130A
 magscale 1 2
-timestamp 1605927685
+timestamp 1605995445
 << error_s >>
+rect -4389 9085 -4379 9131
+rect -4361 9057 -4351 9159
+rect -4073 9057 -4066 9159
+rect -4045 9085 -4038 9131
+rect -1626 9085 -1613 9131
+rect -1598 9057 -1585 9159
 rect -592 8620 -576 8678
 rect 26 8666 30 8678
 rect 38 8632 42 8666
+rect -5119 8532 -5112 8578
+rect -5091 8504 -5084 8605
 rect -404 8054 -392 8100
 rect -125 8074 -121 8108
 << pwell >>
+rect -7384 8100 -7328 8110
 rect -5312 7347 -5094 7557
 << locali >>
 rect -7906 8982 -7699 9791
@@ -17,7 +26,7 @@
 rect -7906 8906 -1313 8982
 rect -7906 8836 -787 8906
 rect -4804 8732 -787 8836
-rect -7912 7919 -7737 8709
+rect -7912 7919 -7726 8710
 rect -4804 8536 -1313 8732
 rect -4940 7919 -1313 8369
 rect -7912 7674 2913 7919
@@ -57,6 +66,8 @@
 rect -5299 7360 -5107 7546
 rect 2254 7128 2392 7560
 << metal1 >>
+rect -7034 9616 -5348 9660
+rect -3564 9612 -2090 9656
 rect -1167 9603 2564 9740
 rect -1167 9579 -783 9603
 rect -7662 9555 -7565 9557
@@ -64,10 +75,14 @@
 rect -7220 9423 -5026 9559
 rect -7345 9184 -5310 9319
 rect -4854 9189 -4547 9335
-rect -7662 8091 -7565 9170
+rect -7662 8652 -7565 9170
+rect -7034 9084 -5348 9128
 rect -4361 8875 -4291 9566
 rect -5465 8805 -4291 8875
+rect -7662 8500 -7584 8652
+rect -7662 8104 -7565 8500
 rect -7502 7475 -7448 8564
+rect -7066 8534 -5592 8578
 rect -7384 8276 -7213 8503
 rect -5465 8483 -5395 8805
 rect -4361 8804 -4291 8805
@@ -76,11 +91,14 @@
 rect -4148 8696 -4066 9575
 rect -3738 9403 -1776 9564
 rect -3881 9176 -2045 9336
+rect -3568 9084 -2094 9128
 rect -5091 8605 -4066 8696
 rect -7384 8110 -5287 8276
-rect -7384 7864 -7213 8110
+rect -7384 8100 -7213 8110
 rect -5091 8104 -5005 8605
 rect -1598 8249 -1516 9575
+rect -7342 7864 -7213 8100
+rect -7066 8020 -5592 8064
 rect -1167 7664 -943 9579
 rect -789 8765 2570 9020
 rect -789 8632 2734 8765
@@ -111,64 +129,64 @@
 rect 219 581 275 1381
 << metal3 >>
 rect 3560 3862 4360 3982
-use sky130_fd_pr__nfet_g5v0d10v5_BN2NTK  sky130_fd_pr__nfet_g5v0d10v5_BN2NTK_0
-timestamp 1605923309
-transform 1 0 -5189 0 1 8299
-box -308 -458 308 458
-use sky130_fd_pr__nfet_g5v0d10v5_BN2NTK  sky130_fd_pr__nfet_g5v0d10v5_BN2NTK_1
-timestamp 1605923309
-transform -1 0 -7477 0 1 8299
-box -308 -458 308 458
-use sky130_fd_pr__nfet_g5v0d10v5_BGRBXK  sky130_fd_pr__nfet_g5v0d10v5_BGRBXK_0
-timestamp 1605923309
-transform 1 0 -6333 0 1 8299
+use sky130_fd_pr__pfet_g5v0d10v5_6UDFJU  sky130_fd_pr__pfet_g5v0d10v5_6UDFJU_0
+timestamp 1605994897
+transform 1 0 -6190 0 1 9372
+box -1101 -497 1101 497
+use sky130_fd_pr__pfet_g5v0d10v5_6E4TNU  sky130_fd_pr__pfet_g5v0d10v5_6E4TNU_0
+timestamp 1605994897
+transform 1 0 -7439 0 1 9372
+box -338 -497 338 497
+use sky130_fd_pr__nfet_g5v0d10v5_CWNXJM  sky130_fd_pr__nfet_g5v0d10v5_CWNXJM_0
+timestamp 1605994897
+transform 1 0 -6332 0 1 8300
 box -962 -458 962 458
+use sky130_fd_pr__nfet_g5v0d10v5_ZK8HQC  sky130_fd_pr__nfet_g5v0d10v5_ZK8HQC_1
+timestamp 1605994897
+transform -1 0 -7476 0 1 8300
+box -308 -458 308 458
+use sky130_fd_pr__pfet_g5v0d10v5_ZPXEXA  sky130_fd_pr__pfet_g5v0d10v5_ZPXEXA_0
+timestamp 1605995445
+transform 1 0 -2829 0 1 9372
+box -992 -497 992 497
+use sky130_fd_pr__pfet_g5v0d10v5_Z95PRA  sky130_fd_pr__pfet_g5v0d10v5_Z95PRA_0
+timestamp 1605995445
+transform 1 0 -4941 0 1 9372
+box -338 -497 338 497
+use sky130_fd_pr__pfet_g5v0d10v5_6E4TNU  sky130_fd_pr__pfet_g5v0d10v5_6E4TNU_2
+timestamp 1605994897
+transform 1 0 -4455 0 1 9372
+box -338 -497 338 497
+use sky130_fd_pr__pfet_g5v0d10v5_6E4TNU  sky130_fd_pr__pfet_g5v0d10v5_6E4TNU_3
+timestamp 1605994897
+transform 1 0 -3969 0 1 9372
+box -338 -497 338 497
+use sky130_fd_pr__nfet_g5v0d10v5_ZK8HQC  sky130_fd_pr__nfet_g5v0d10v5_ZK8HQC_0
+timestamp 1605994897
+transform 1 0 -5188 0 1 8300
+box -308 -458 308 458
+use sky130_fd_pr__pfet_g5v0d10v5_6E4TNU  sky130_fd_pr__pfet_g5v0d10v5_6E4TNU_4
+timestamp 1605994897
+transform 1 0 -1689 0 1 9372
+box -338 -497 338 497
 use sky130_fd_sc_hvl__schmittbuf_1  sky130_fd_sc_hvl__schmittbuf_1_0 ~/projects/efabless/tech/SW/sky130A/libs.ref/sky130_fd_sc_hvl/mag
-timestamp 1605926584
+timestamp 1605995445
 transform 1 0 -790 0 1 7935
 box -66 -23 1122 897
 use sky130_fd_sc_hvl__buf_8  sky130_fd_sc_hvl__buf_8_0 ~/projects/efabless/tech/SW/sky130A/libs.ref/sky130_fd_sc_hvl/mag
-timestamp 1605926584
+timestamp 1605995445
 transform 1 0 266 0 1 7935
 box -66 -23 1986 897
-use sky130_fd_sc_hvl__fill_4  sky130_fd_sc_hvl__fill_4_0 ~/projects/efabless/tech/SW/sky130A/libs.ref/sky130_fd_sc_hvl/mag
-timestamp 1605926584
-transform 1 0 2186 0 1 7935
-box -66 -23 450 897
-use sky130_fd_pr__pfet_g5v0d10v5_625PAY  sky130_fd_pr__pfet_g5v0d10v5_625PAY_3
-timestamp 1605926584
-transform 1 0 -4941 0 1 9372
-box -338 -497 338 497
-use sky130_fd_pr__pfet_g5v0d10v5_625PDX  sky130_fd_pr__pfet_g5v0d10v5_625PDX_0
-timestamp 1605926584
-transform 1 0 -6190 0 1 9372
-box -1101 -497 1101 497
-use sky130_fd_pr__pfet_g5v0d10v5_625PAY  sky130_fd_pr__pfet_g5v0d10v5_625PAY_4
-timestamp 1605926584
-transform 1 0 -7439 0 1 9372
-box -338 -497 338 497
-use sky130_fd_pr__pfet_g5v0d10v5_625P8Z  sky130_fd_pr__pfet_g5v0d10v5_625P8Z_0
-timestamp 1605926584
-transform 1 0 -2829 0 1 9372
-box -992 -497 992 497
-use sky130_fd_pr__pfet_g5v0d10v5_625PAY  sky130_fd_pr__pfet_g5v0d10v5_625PAY_0
-timestamp 1605926584
-transform 1 0 -3969 0 1 9372
-box -338 -497 338 497
-use sky130_fd_pr__pfet_g5v0d10v5_625PAY  sky130_fd_pr__pfet_g5v0d10v5_625PAY_2
-timestamp 1605926584
-transform 1 0 -4455 0 1 9372
-box -338 -497 338 497
-use sky130_fd_pr__pfet_g5v0d10v5_625PAY  sky130_fd_pr__pfet_g5v0d10v5_625PAY_1
-timestamp 1605926584
-transform 1 0 -1689 0 1 9372
-box -338 -497 338 497
 use sky130_fd_sc_hvl__buf_8  sky130_fd_sc_hvl__buf_8_1
-timestamp 1605926584
+timestamp 1605995445
 transform 1 0 -790 0 -1 9703
 box -66 -23 1986 897
+use sky130_fd_sc_hvl__fill_4  sky130_fd_sc_hvl__fill_4_0 ~/projects/efabless/tech/SW/sky130A/libs.ref/sky130_fd_sc_hvl/mag
+timestamp 1605995445
+transform 1 0 2186 0 1 7935
+box -66 -23 450 897
 use sky130_fd_sc_hvl__inv_8  sky130_fd_sc_hvl__inv_8_0 ~/projects/efabless/tech/SW/sky130A/libs.ref/sky130_fd_sc_hvl/mag
-timestamp 1605926584
+timestamp 1605995445
 transform 1 0 1130 0 -1 9703
 box -66 -23 1506 897
 use sky130_fd_pr__res_xhigh_po_0p69_LV2JUS  sky130_fd_pr__res_xhigh_po_0p69_LV2JUS_0