diff --git a/machine_alpha/ALU_3_in_1.bdf b/machine_alpha/ALU_3_in_1.bdf
index 53488aa..ba0e563 100644
--- a/machine_alpha/ALU_3_in_1.bdf
+++ b/machine_alpha/ALU_3_in_1.bdf
@@ -2235,7 +2235,7 @@ applicable agreement for further details.
 	(flipy)
 )
 (symbol
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+	(rect 1048 432 1080 464)
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 	(text "inst4" (rect 3 21 26 33)(font "Arial" )(invisible))
 	(port
@@ -2252,7 +2252,7 @@ applicable agreement for further details.
 	)
 )
 (symbol
-	(rect 1016 344 1048 360)
+	(rect 1048 344 1080 360)
 	(text "VCC" (rect 7 0 27 10)(font "Arial" (font_size 6)))
 	(text "inst18" (rect 3 5 32 17)(font "Arial" )(invisible))
 	(port
@@ -2337,7 +2337,7 @@ applicable agreement for further details.
 (symbol
 	(rect 1096 240 1144 304)
 	(text "OR2" (rect 0 45 10 63)(font "Arial" (font_size 6))(vertical))
-	(text "right" (rect 38 37 50 58)(font "Arial" )(vertical))
+	(text "right" (rect 39 36 51 57)(font "Arial" )(vertical))
 	(port
 		(pt 32 64)
 		(input)
@@ -2437,45 +2437,43 @@ applicable agreement for further details.
 	(rotate90)
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 (symbol
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-	(text "nano_selector" (rect 5 0 86 14)(font "Arial" (font_size 8)))
-	(text "OverflowSelect" (rect 8 80 83 92)(font "Arial" ))
+	(rect 976 -32 1008 0)
+	(text "GND" (rect 8 16 29 26)(font "Arial" (font_size 6)))
+	(text "inst7" (rect 3 21 26 33)(font "Arial" )(invisible))
 	(port
-		(pt 0 32)
-		(input)
-		(text "A" (rect 0 0 9 14)(font "Arial" (font_size 8)))
-		(text "A" (rect 21 27 30 41)(font "Arial" (font_size 8)))
-		(line (pt 0 32)(pt 16 32)(line_width 1))
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-	(port
-		(pt 0 48)
-		(input)
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-		(text "B" (rect 21 43 29 57)(font "Arial" (font_size 8)))
-		(line (pt 0 48)(pt 16 48)(line_width 1))
-	)
-	(port
-		(pt 0 64)
-		(input)
-		(text "A_EN" (rect 0 0 31 14)(font "Arial" (font_size 8)))
-		(text "A_EN" (rect 21 59 52 73)(font "Arial" (font_size 8)))
-		(line (pt 0 64)(pt 16 64)(line_width 1))
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-	(port
-		(pt 96 32)
+		(pt 16 0)
 		(output)
-		(text "Q" (rect 0 0 9 14)(font "Arial" (font_size 8)))
-		(text "Q" (rect 66 27 75 41)(font "Arial" (font_size 8)))
-		(line (pt 96 32)(pt 80 32)(line_width 1))
+		(text "1" (rect 18 0 23 12)(font "Courier New" (bold))(invisible))
+		(text "1" (rect 18 0 23 12)(font "Courier New" (bold))(invisible))
+		(line (pt 16 8)(pt 16 0)(line_width 1))
 	)
 	(drawing
-		(rectangle (rect 16 16 80 80)(line_width 1))
+		(line (pt 8 8)(pt 16 16)(line_width 1))
+		(line (pt 16 16)(pt 24 8)(line_width 1))
+		(line (pt 8 8)(pt 24 8)(line_width 1))
+	)
+)
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+	(rect 1160 -40 1192 -8)
+	(text "GND" (rect 8 16 29 26)(font "Arial" (font_size 6)))
+	(text "inst10" (rect 3 21 32 33)(font "Arial" )(invisible))
+	(port
+		(pt 16 0)
+		(output)
+		(text "1" (rect 18 0 23 12)(font "Courier New" (bold))(invisible))
+		(text "1" (rect 18 0 23 12)(font "Courier New" (bold))(invisible))
+		(line (pt 16 8)(pt 16 0)(line_width 1))
+	)
+	(drawing
+		(line (pt 8 8)(pt 16 16)(line_width 1))
+		(line (pt 16 16)(pt 24 8)(line_width 1))
+		(line (pt 8 8)(pt 24 8)(line_width 1))
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 (symbol
 	(rect 992 56 1088 152)
 	(text "nano_selector" (rect 5 0 86 14)(font "Arial" (font_size 8)))
-	(text "CarrySelect" (rect 8 80 67 92)(font "Arial" ))
+	(text "CarrySelect_OnlyWhenAdding" (rect 8 80 157 92)(font "Arial" ))
 	(port
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 		(input)
@@ -2511,7 +2509,7 @@ applicable agreement for further details.
 (symbol
 	(rect 1008 -128 1104 -32)
 	(text "nano_selector" (rect 5 0 86 14)(font "Arial" (font_size 8)))
-	(text "NegativeSelect" (rect 8 80 83 92)(font "Arial" ))
+	(text "NegativeSelect_OnlyWhenSigned" (rect 8 80 174 92)(font "Arial" ))
 	(port
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 		(input)
@@ -2545,37 +2543,39 @@ applicable agreement for further details.
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 (symbol
-	(rect 976 -32 1008 0)
-	(text "GND" (rect 8 16 29 26)(font "Arial" (font_size 6)))
-	(text "inst7" (rect 3 21 26 33)(font "Arial" )(invisible))
+	(rect 1008 -224 1104 -128)
+	(text "nano_selector" (rect 5 0 86 14)(font "Arial" (font_size 8)))
+	(text "OverflowSelect_OnlyWhenSigned" (rect 8 80 174 92)(font "Arial" ))
 	(port
-		(pt 16 0)
+		(pt 0 32)
+		(input)
+		(text "A" (rect 0 0 9 14)(font "Arial" (font_size 8)))
+		(text "A" (rect 21 27 30 41)(font "Arial" (font_size 8)))
+		(line (pt 0 32)(pt 16 32)(line_width 1))
+	)
+	(port
+		(pt 0 48)
+		(input)
+		(text "B" (rect 0 0 8 14)(font "Arial" (font_size 8)))
+		(text "B" (rect 21 43 29 57)(font "Arial" (font_size 8)))
+		(line (pt 0 48)(pt 16 48)(line_width 1))
+	)
+	(port
+		(pt 0 64)
+		(input)
+		(text "A_EN" (rect 0 0 31 14)(font "Arial" (font_size 8)))
+		(text "A_EN" (rect 21 59 52 73)(font "Arial" (font_size 8)))
+		(line (pt 0 64)(pt 16 64)(line_width 1))
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 		(output)
-		(text "1" (rect 18 0 23 12)(font "Courier New" (bold))(invisible))
-		(text "1" (rect 18 0 23 12)(font "Courier New" (bold))(invisible))
-		(line (pt 16 8)(pt 16 0)(line_width 1))
+		(text "Q" (rect 0 0 9 14)(font "Arial" (font_size 8)))
+		(text "Q" (rect 66 27 75 41)(font "Arial" (font_size 8)))
+		(line (pt 96 32)(pt 80 32)(line_width 1))
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-		(line (pt 16 16)(pt 24 8)(line_width 1))
-		(line (pt 8 8)(pt 24 8)(line_width 1))
+		(rectangle (rect 16 16 80 80)(line_width 1))
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@@ -3194,22 +3194,6 @@ applicable agreement for further details.
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@@ -3218,22 +3202,6 @@ applicable agreement for further details.
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@@ -3242,22 +3210,6 @@ applicable agreement for further details.
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@@ -3302,14 +3254,6 @@ applicable agreement for further details.
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@@ -3390,22 +3334,10 @@ applicable agreement for further details.
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@@ -3458,22 +3390,10 @@ applicable agreement for further details.
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@@ -3498,30 +3418,6 @@ applicable agreement for further details.
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@@ -3538,46 +3434,10 @@ applicable agreement for further details.
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@@ -3602,21 +3462,6 @@ applicable agreement for further details.
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@@ -3734,22 +3579,10 @@ applicable agreement for further details.
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@@ -3835,6 +3668,185 @@ applicable agreement for further details.
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@@ -3868,10 +3880,7 @@ applicable agreement for further details.
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@@ -3881,6 +3890,9 @@ applicable agreement for further details.
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