diff --git a/ext2spice/ext2spice.c b/ext2spice/ext2spice.c
index a5bc4817..43ebabbe 100644
--- a/ext2spice/ext2spice.c
+++ b/ext2spice/ext2spice.c
@@ -140,9 +140,16 @@ esFormatSubs(outf, suf)
 	if ((EFTrimFlags & EF_TRIMGLOB ) && suf[l] == '!' ||
 	         (EFTrimFlags & EF_TRIMLOCAL) && suf[l] == '#')
 	    suf[l] = '\0' ;
-	if (EFTrimFlags & EF_CONVERTCOMMAS)
+	if (EFTrimFlags & EF_CONVERTCOMMA)
 	    while ((specchar = strchr(suf, ',')) != NULL)
-		*specchar = ';';
+		*specchar = '|';
+	if (EFTrimFlags & EF_CONVERTBRACKETS)
+	{
+	    while ((specchar = strchr(suf, '[')) != NULL)
+		*specchar = '_';
+	    while ((specchar = strchr(suf, ']')) != NULL)
+		*specchar = '_';
+	}
 	if (EFTrimFlags & EF_CONVERTEQUAL)
 	    while ((specchar = strchr(suf, '=')) != NULL)
 		*specchar = ':';
@@ -607,7 +614,7 @@ CmdExtToSpice(w, cmd)
 	case EXTTOSPC_DEFAULT:
 	    LocCapThreshold = 2;
 	    LocResistThreshold = INFINITE_THRESHOLD;
-	    EFTrimFlags = EF_CONVERTCOMMAS | EF_CONVERTEQUAL;
+	    EFTrimFlags = EF_CONVERTCOMMA | EF_CONVERTEQUAL;
 	    EFScale = 0.0;
 	    if (EFArgTech)
 	    {
@@ -821,7 +828,7 @@ runexttospice:
 
     // This forces options TRIMGLOB and CONVERTEQUAL, not sure that's such a
     // good idea. . .
-    EFTrimFlags |= EF_TRIMGLOB | EF_CONVERTEQUAL;
+    EFTrimFlags |= EF_TRIMGLOB | EF_CONVERTEQUAL | EF_CONVERTCOMMA;
     if (IS_FINITE_F(EFCapThreshold)) flatFlags |= EF_FLATCAPS;
     if (esFormat == HSPICE)
 	EFTrimFlags |= EF_TRIMLOCAL;
@@ -1379,7 +1386,7 @@ subcktVisit(use, hierName, is_top)
     else
     {
 	int savflags = EFTrimFlags;
-	EFTrimFlags = 0;	// Do no substitutions on subcircuit names
+	EFTrimFlags = EF_CONVERTCOMMA;	// Only substitute commas on subcircuit names
 
 	/* Use full hierarchical decomposition for name */
 	/* (not just use->use_id.  hierName already has use->use_id at end) */
@@ -3220,7 +3227,7 @@ EFHNSprintf(str, hierName)
     char *str;
     HierName *hierName;
 {
-    bool trimGlob, trimLocal, convertComma, convertEqual;
+    bool trimGlob, trimLocal, convertComma, convertEqual, convertBrackets;
     char *s, *cp, c;
     char *efHNSprintfPrefix(HierName *, char *);
 
@@ -3231,8 +3238,9 @@ EFHNSprintf(str, hierName)
 	cp = hierName->hn_name; 
 	trimGlob = (EFTrimFlags & EF_TRIMGLOB);
 	trimLocal = (EFTrimFlags & EF_TRIMLOCAL);
-	convertComma = (EFTrimFlags & EF_CONVERTCOMMAS);
+	convertComma = (EFTrimFlags & EF_CONVERTCOMMA);
 	convertEqual = (EFTrimFlags & EF_CONVERTEQUAL);
+	convertBrackets = (EFTrimFlags & EF_CONVERTBRACKETS);
 	while (c = *cp++)
 	{
 	    switch (c)
@@ -3240,7 +3248,9 @@ EFHNSprintf(str, hierName)
 		case '!':	if (!trimGlob) *str++ = c; break;
 		case '.':	*str++ = (esFormat == HSPICE)?'@':'.'; break;
 		case '=':	if (convertEqual) *str++ = ':'; break;
-		case ',':	if (convertComma) *str++ = ';'; break;
+		case ',':	if (convertComma) *str++ = '|'; break;
+		case '[':	*str++ = (convertBrackets) ? '_' : '['; break;
+		case ']':	*str++ = (convertBrackets) ? '_' : ']'; break;
 		case '#':	if (trimLocal) break;	// else fall through
 		default:	*str++ = c; break;
 	    }
@@ -3257,6 +3267,8 @@ char *efHNSprintfPrefix(hierName, str)
 {
     char *cp, c;
     bool convertEqual = (EFTrimFlags & EF_CONVERTEQUAL) ? TRUE : FALSE;
+    bool convertComma = (EFTrimFlags & EF_CONVERTCOMMA) ? TRUE : FALSE;
+    bool convertBrackets = (EFTrimFlags & EF_CONVERTBRACKETS) ? TRUE : FALSE;
 
     if (hierName->hn_parent)
 	str = efHNSprintfPrefix(hierName->hn_parent, str);
@@ -3265,6 +3277,13 @@ char *efHNSprintfPrefix(hierName, str)
     while (1) {
 	if (convertEqual && (*cp == '='))
 	   *str = ':';
+	else if (convertBrackets && ((*cp == '[') || (*cp == ']')))
+	   *str = '_';
+	else if (*cp == ',')
+	{
+	    if (convertComma) *str = '|';
+	    else str--;
+	}
 	else
 	   *str = *cp;
 	if (!(*str)) break;
diff --git a/extflat/EFargs.c b/extflat/EFargs.c
index 40b57278..dd812dac 100644
--- a/extflat/EFargs.c
+++ b/extflat/EFargs.c
@@ -209,8 +209,10 @@ EFArgs(argc, argv, err_result, argsProc, cdata)
 		    goto usage;
 		if (strchr(cp, '!')) EFTrimFlags |= EF_TRIMGLOB;
 		if (strchr(cp, '#')) EFTrimFlags |= EF_TRIMLOCAL;
-		if (strchr(cp, ',')) EFTrimFlags |= EF_CONVERTCOMMAS;
+		if (strchr(cp, ',')) EFTrimFlags |= EF_CONVERTCOMMA;
 		if (strchr(cp, '=')) EFTrimFlags |= EF_CONVERTEQUAL;
+		if (strchr(cp, '[')) EFTrimFlags |= EF_CONVERTBRACKETS;
+		if (strchr(cp, ']')) EFTrimFlags |= EF_CONVERTBRACKETS;
 		break;
 	    case 'C':
 		EFCapThreshold = (EFCapValue)INFINITE_THRESHOLD_F;
diff --git a/extflat/EFvisit.c b/extflat/EFvisit.c
index aadb98ff..8d802edd 100644
--- a/extflat/EFvisit.c
+++ b/extflat/EFvisit.c
@@ -859,7 +859,7 @@ EFHNOut(hierName, outf)
     HierName *hierName;
     FILE *outf;
 {
-    bool trimGlob, trimLocal, trimComma;
+    bool trimGlob, trimLocal, convComma, convBrackets;
     char *cp, c;
 
     if (hierName->hn_parent) efHNOutPrefix(hierName->hn_parent, outf);
@@ -868,13 +868,19 @@ EFHNOut(hierName, outf)
 	cp = hierName->hn_name; 
 	trimGlob = (EFTrimFlags & EF_TRIMGLOB);
 	trimLocal = (EFTrimFlags & EF_TRIMLOCAL);
-	trimComma = (EFTrimFlags & EF_CONVERTCOMMAS);
+	convComma = (EFTrimFlags & EF_CONVERTCOMMA);
+	convBrackets = (EFTrimFlags & EF_CONVERTBRACKETS);
 	while (c = *cp++)
 	{
 	    if (*cp) 
 	    {
-		if (trimComma && (c == ','))
-		    putc(';', outf);
+		if (c == ',')
+		{
+		    if (convComma)
+			putc('|', outf);
+		}
+		else if (convBrackets && ((c == '[') || (c == ']')))
+		    putc('_', outf);
 		else
 		    putc(c, outf);
 	    }
diff --git a/extflat/extflat.h b/extflat/extflat.h
index 8d8f1dba..f249e37c 100644
--- a/extflat/extflat.h
+++ b/extflat/extflat.h
@@ -40,8 +40,9 @@ typedef unsigned char U_char;
 /* Flags to control output of node names.  Stored in EFTrimFlags */
 #define	EF_TRIMGLOB		0x01	/* Delete trailing '!' from names */
 #define	EF_TRIMLOCAL		0x02	/* Delete trailing '#' from names */
-#define EF_CONVERTCOMMAS	0x04	/* Change ',' to ';' in names */
-#define EF_CONVERTEQUAL		0x08	/* Change '=' to ':' in names */
+#define EF_CONVERTCOMMA		0x04	/* Change ',' to '|' in names, else remove */
+#define EF_CONVERTEQUAL		0x08	/* Change '=' to ':' in names, else remove */
+#define EF_CONVERTBRACKETS	0x10	/* Change '[' and ']' to '_' in names */
 
 /*
  * capacitance type now set to float