diff --git a/dev/general/MainSys/CV_GEN.SchDoc b/dev/general/MainSys/CV_GEN.SchDoc
index 2dc655b..a0c073d 100644
Binary files a/dev/general/MainSys/CV_GEN.SchDoc and b/dev/general/MainSys/CV_GEN.SchDoc differ
diff --git a/dev/general/MainSys/EXT.Harness b/dev/general/MainSys/EXT.Harness
new file mode 100644
index 0000000..d900293
--- /dev/null
+++ b/dev/general/MainSys/EXT.Harness
@@ -0,0 +1,9 @@
+BPM=VALUE,LED,BUTTON
+SB=R1,P1,R2,P2,REC
+VCA_CTRL_1=POT_GAIN_B,POT_GAIN_A
+VCA_CTRL_2=POT_GAIN_B,POT_GAIN_A
+VCF_CTRL_1=POT_FILTER_A,POT_FILTER_B,SIG_SEL_A,SIG_SEL_P1,SIG_SEL_P4,SIG_SEL_P7,SIG_SEL_P10
+VCF_CTRL_2=POT_FILTER_A,POT_FILTER_B,SIG_SEL_A,SIG_SEL_P1,SIG_SEL_P4,SIG_SEL_P7,SIG_SEL_P10
+VCO_CTRL_1=OFFSET_SEL_PA,OFFSET_SEL_P1,OFFSET_SEL_P4,OFFSET_SEL_P7,OFFSET_SEL_P10,POT_FINE_A,POT_FINE_B,POT_PWM_ADJ,IN_TRI,IN_SAW,IN_SQR,IN_PWM,OUT
+VCO_CTRL_2=OFFSET_SEL_PA,OFFSET_SEL_P1,OFFSET_SEL_P4,OFFSET_SEL_P7,OFFSET_SEL_P10,POT_FINE_A,POT_FINE_B,POT_PWM_ADJ,IN_TRI,IN_SAW,IN_SQR,IN_PWM,OUT
+VOLUME=POT_VOL_1,POT_VOL_2
diff --git a/dev/general/MainSys/EXT.SchDoc b/dev/general/MainSys/EXT.SchDoc
index bf512f5..f8a72b3 100644
Binary files a/dev/general/MainSys/EXT.SchDoc and b/dev/general/MainSys/EXT.SchDoc differ
diff --git a/dev/general/MainSys/MAIN.PcbDoc b/dev/general/MainSys/MAIN.PcbDoc
new file mode 100644
index 0000000..e0798f2
Binary files /dev/null and b/dev/general/MainSys/MAIN.PcbDoc differ
diff --git a/dev/general/MainSys/MCU.SchDoc b/dev/general/MainSys/MCU.SchDoc
index 47f123f..d7f98f7 100644
Binary files a/dev/general/MainSys/MCU.SchDoc and b/dev/general/MainSys/MCU.SchDoc differ
diff --git a/dev/general/MainSys/MainSys.PrjPcb b/dev/general/MainSys/MainSys.PrjPcb
index d907ef7..b757e49 100644
--- a/dev/general/MainSys/MainSys.PrjPcb
+++ b/dev/general/MainSys/MainSys.PrjPcb
@@ -111,10 +111,10 @@ AnnotateOrder=3
 DoLibraryUpdate=1
 DoDatabaseUpdate=1
 ClassGenCCAutoEnabled=1
-ClassGenCCAutoRoomEnabled=0
+ClassGenCCAutoRoomEnabled=1
 ClassGenNCAutoScope=None
 DItemRevisionGUID=
-GenerateClassCluster=0
+GenerateClassCluster=1
 DocumentUniqueId=BEYQFIFN
 
 [Document5]
@@ -270,6 +270,40 @@ DItemRevisionGUID=
 GenerateClassCluster=0
 DocumentUniqueId=
 
+[Document14]
+DocumentPath=EXT.Harness
+AnnotationEnabled=1
+AnnotateStartValue=1
+AnnotationIndexControlEnabled=0
+AnnotateSuffix=
+AnnotateScope=All
+AnnotateOrder=-1
+DoLibraryUpdate=1
+DoDatabaseUpdate=1
+ClassGenCCAutoEnabled=1
+ClassGenCCAutoRoomEnabled=0
+ClassGenNCAutoScope=None
+DItemRevisionGUID=
+GenerateClassCluster=0
+DocumentUniqueId=
+
+[Document15]
+DocumentPath=MAIN.PcbDoc
+AnnotationEnabled=1
+AnnotateStartValue=1
+AnnotationIndexControlEnabled=0
+AnnotateSuffix=
+AnnotateScope=All
+AnnotateOrder=-1
+DoLibraryUpdate=1
+DoDatabaseUpdate=1
+ClassGenCCAutoEnabled=1
+ClassGenCCAutoRoomEnabled=0
+ClassGenNCAutoScope=None
+DItemRevisionGUID=
+GenerateClassCluster=0
+DocumentUniqueId=TVEIXTYM
+
 [Parameter1]
 Name=ProjectTitle
 Value=Audio synth
@@ -1242,6 +1276,11 @@ UpdateVariants=1
 UpdateToLatestRevision=1
 PartTypes=0
 
+[NetInfos]
+Net1=NetName=D_N|NetColor=clYellow
+Net2=NetName=D_P|NetColor=clYellow
+Net3=NetName=GND|NetColor=$00FF6E6E
+
 [Comparison Options]
 ComparisonOptions0=Kind=Net|MinPercent=75|MinMatch=3|ShowMatch=0|UseName=-1|InclAllRules=0
 ComparisonOptions1=Kind=Net Class|MinPercent=75|MinMatch=3|ShowMatch=0|UseName=-1|InclAllRules=0
diff --git a/dev/general/MainSys/OS.SchDoc b/dev/general/MainSys/OS.SchDoc
index d666fd8..186131d 100644
Binary files a/dev/general/MainSys/OS.SchDoc and b/dev/general/MainSys/OS.SchDoc differ
diff --git a/dev/general/MainSys/PM.SchDoc b/dev/general/MainSys/PM.SchDoc
index 978c360..b910373 100644
Binary files a/dev/general/MainSys/PM.SchDoc and b/dev/general/MainSys/PM.SchDoc differ
diff --git a/dev/general/MainSys/SC.SchDoc b/dev/general/MainSys/SC.SchDoc
index b4bb531..d589496 100644
Binary files a/dev/general/MainSys/SC.SchDoc and b/dev/general/MainSys/SC.SchDoc differ
diff --git a/dev/general/MainSys/TOP.SchDoc b/dev/general/MainSys/TOP.SchDoc
index 25ba078..4885780 100644
Binary files a/dev/general/MainSys/TOP.SchDoc and b/dev/general/MainSys/TOP.SchDoc differ
diff --git a/dev/general/MainSys/VCF_A.Harness b/dev/general/MainSys/VCF_A.Harness
index 581f870..381e7c0 100644
--- a/dev/general/MainSys/VCF_A.Harness
+++ b/dev/general/MainSys/VCF_A.Harness
@@ -1 +1,2 @@
-VCF_CTRL=
+VCA_CTRL=POT_GAIN_B,POT_GAIN_A
+VCF_CTRL=POT_FILTER_A,POT_FILTER_B,SIG_SEL_A,SIG_SEL_P1,SIG_SEL_P4,SIG_SEL_P7,SIG_SEL_P10
diff --git a/dev/general/MainSys/VCF_A.SchDoc b/dev/general/MainSys/VCF_A.SchDoc
index 577a5ac..65d5289 100644
Binary files a/dev/general/MainSys/VCF_A.SchDoc and b/dev/general/MainSys/VCF_A.SchDoc differ
diff --git a/dev/general/MainSys/VCO.SchDoc b/dev/general/MainSys/VCO.SchDoc
index 97f25fc..767b6f9 100644
Binary files a/dev/general/MainSys/VCO.SchDoc and b/dev/general/MainSys/VCO.SchDoc differ