diff --git a/sim/pi_filter.asc b/sim/pi_filter.asc
index 79b09c7..add1e55 100644
--- a/sim/pi_filter.asc
+++ b/sim/pi_filter.asc
@@ -5,50 +5,55 @@ WIRE -1248 -560 -1360 -560
 WIRE -960 -560 -1168 -560
 WIRE -832 -560 -960 -560
 WIRE -384 -560 -832 -560
-WIRE 384 -560 -384 -560
-WIRE 480 -560 384 -560
+WIRE 224 -560 -384 -560
+WIRE 320 -560 224 -560
+WIRE 480 -560 320 -560
 WIRE 752 -560 480 -560
 WIRE -1360 -544 -1360 -560
 WIRE -960 -544 -960 -560
 WIRE -832 -544 -832 -560
-WIRE 384 -512 384 -560
+WIRE 480 -528 480 -560
+WIRE 224 -512 224 -560
 WIRE -1360 -448 -1360 -480
 WIRE -960 -448 -960 -480
 WIRE -832 -448 -832 -480
 WIRE -1600 -432 -1600 -560
 WIRE -1600 -432 -1680 -432
-WIRE 480 -416 480 -560
+WIRE 320 -416 320 -560
+WIRE 480 -416 480 -448
 WIRE -1600 -400 -1600 -432
-WIRE 384 -368 384 -432
-WIRE 416 -368 384 -368
+WIRE 224 -368 224 -432
+WIRE 256 -368 224 -368
 WIRE -1680 -336 -1680 -432
 WIRE 752 -320 752 -560
-WIRE 480 -304 480 -320
-WIRE 640 -304 480 -304
-WIRE 704 -304 640 -304
+WIRE 320 -304 320 -320
+WIRE 480 -304 480 -352
+WIRE 480 -304 320 -304
+WIRE 672 -304 480 -304
+WIRE 704 -304 672 -304
 WIRE -1600 -288 -1600 -320
-WIRE 480 -288 480 -304
+WIRE 320 -288 320 -304
 WIRE -1680 -240 -1680 -272
-WIRE 384 -240 384 -368
-WIRE 416 -240 384 -240
-WIRE 480 -160 480 -192
+WIRE 224 -240 224 -368
+WIRE 256 -240 224 -240
+WIRE 320 -160 320 -192
 WIRE -1600 -112 -1600 -208
 WIRE -1600 -64 -1600 -112
-WIRE 384 -64 384 -240
+WIRE 224 -64 224 -240
 WIRE 752 -48 752 -224
 WIRE 992 -48 752 -48
 WIRE 752 0 752 -48
 WIRE 752 48 752 0
 WIRE -1600 64 -1600 16
 WIRE -1600 64 -1728 64
-WIRE 384 64 384 16
+WIRE 224 64 224 16
 WIRE -1600 80 -1600 64
 WIRE -1728 112 -1728 64
-WIRE 208 144 112 144
-WIRE 336 144 288 144
+WIRE 48 144 -48 144
+WIRE 176 144 128 144
 WIRE -1600 176 -1600 160
-WIRE 384 176 384 160
-WIRE 112 208 112 144
+WIRE 224 176 224 160
+WIRE -48 208 -48 144
 WIRE 752 208 752 128
 WIRE -1728 256 -1728 176
 WIRE 752 320 752 288
@@ -67,15 +72,15 @@ FLAG 848 496 0
 FLAG -1360 -448 0
 FLAG -1600 -112 drv
 FLAG -1728 256 0
-FLAG 384 176 0
-FLAG 112 288 0
+FLAG 224 176 0
+FLAG -48 288 0
 FLAG -960 -448 0
 FLAG -832 -448 0
 FLAG 992 496 0
 FLAG -1680 -240 0
 FLAG 752 0 tip
-FLAG 480 -160 0
-FLAG 640 -304 gate
+FLAG 320 -160 0
+FLAG 672 -304 gate
 SYMBOL res 736 336 R0
 SYMATTR InstName R1
 SYMATTR Value {rtip}
@@ -115,21 +120,21 @@ SYMATTR SpiceLine Rser=1m
 SYMBOL pmos 704 -224 M180
 SYMATTR InstName M1
 SYMATTR Value FDD4141
-SYMBOL res 368 -528 R0
+SYMBOL res 208 -528 R0
 SYMATTR InstName R6
 SYMATTR Value 10k
-SYMBOL res 368 -80 R0
+SYMBOL res 208 -80 R0
 SYMATTR InstName R7
 SYMATTR Value 4.7k
-SYMBOL nmos 336 64 R0
+SYMBOL nmos 176 64 R0
 SYMATTR InstName M3
 SYMATTR Value RJU003N03
-SYMBOL res 304 128 R90
+SYMBOL res 144 128 R90
 WINDOW 0 0 56 VBottom 2
 WINDOW 3 32 56 VTop 2
 SYMATTR InstName R10
 SYMATTR Value 100
-SYMBOL voltage 112 192 R0
+SYMBOL voltage -48 192 R0
 WINDOW 123 0 0 Left 0
 WINDOW 39 0 0 Left 0
 SYMATTR InstName V2
@@ -145,8 +150,6 @@ WINDOW 0 24 64 Left 2
 WINDOW 3 24 0 Left 2
 SYMATTR InstName D1
 SYMATTR Value RBR2VWM60A
-SYMATTR Description Diode
-SYMATTR Type diode
 SYMBOL cap -1696 -336 R0
 SYMATTR InstName C3
 SYMATTR Value 100p
@@ -156,12 +159,22 @@ SYMATTR Value 0
 SYMBOL voltage -1600 -80 R0
 SYMATTR InstName V4
 SYMATTR Value 0
-SYMBOL pnp 416 -192 M180
+SYMBOL pnp 256 -192 M180
 SYMATTR InstName Q1
 SYMATTR Value BC807-25
-SYMBOL npn 416 -416 R0
+SYMBOL npn 256 -416 R0
 SYMATTR InstName Q2
 SYMATTR Value BC817-25
+SYMBOL res 464 -544 R0
+SYMATTR InstName R3
+SYMATTR Value 1k
+SYMBOL diode 464 -352 M180
+WINDOW 0 24 64 Left 2
+WINDOW 3 24 0 Left 2
+SYMATTR InstName D2
+SYMATTR Value EDZV15B
+SYMATTR Description Diode
+SYMATTR Type diode
 TEXT -1656 -1016 Left 2 !.tran 30m
 TEXT -1648 -808 Left 2 !.param fsw=1k
 TEXT -1648 -776 Left 2 !.param d={pout/(vbus*vbus/rtip)}