diff --git a/shematic.svg b/shematic.svg
index d2eb565..acc4472 100644
--- a/shematic.svg
+++ b/shematic.svg
@@ -35,68 +35,68 @@
   <!-- Row 1: Arburg pin 1, Zone1+  -->
   <rect x="75" y="148" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="161" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">1</text>
-  <text x="185" y="161" text-anchor="end" fill="#ffcc66" font-size="10">Z1 L</text>
+  <text x="185" y="161" text-anchor="end" fill="#ffcc66" font-size="10">Z1 +</text>
   <circle cx="230" cy="157" r="4" fill="#ffcc66" opacity="0.8"/>
 
   <!-- Row 2: Arburg pin 2, Zone1-  -->
   <rect x="75" y="170" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="183" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">2</text>
-  <text x="185" y="183" text-anchor="end" fill="#ffcc66" font-size="10">Z1 N</text>
+  <text x="185" y="183" text-anchor="end" fill="#ffcc66" font-size="10">Z1 −</text>
   <circle cx="230" cy="179" r="4" fill="#ffcc66" opacity="0.5"/>
 
   <!-- Zone 2 -->
   <rect x="75" y="196" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="209" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">3</text>
-  <text x="185" y="209" text-anchor="end" fill="#ffaa44" font-size="10">Z2 L</text>
+  <text x="185" y="209" text-anchor="end" fill="#ffaa44" font-size="10">Z2 +</text>
   <circle cx="230" cy="205" r="4" fill="#ffaa44" opacity="0.8"/>
 
   <rect x="75" y="218" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="231" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">4</text>
-  <text x="185" y="231" text-anchor="end" fill="#ffaa44" font-size="10">Z2 N</text>
+  <text x="185" y="231" text-anchor="end" fill="#ffaa44" font-size="10">Z2 −</text>
   <circle cx="230" cy="227" r="4" fill="#ffaa44" opacity="0.5"/>
 
   <!-- Zone 3 -->
   <rect x="75" y="244" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="257" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">5</text>
-  <text x="185" y="257" text-anchor="end" fill="#ff8844" font-size="10">Z3 L</text>
+  <text x="185" y="257" text-anchor="end" fill="#ff8844" font-size="10">Z3 +</text>
   <circle cx="230" cy="253" r="4" fill="#ff8844" opacity="0.8"/>
 
   <rect x="75" y="266" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="279" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">6</text>
-  <text x="185" y="279" text-anchor="end" fill="#ff8844" font-size="10">Z3 N</text>
+  <text x="185" y="279" text-anchor="end" fill="#ff8844" font-size="10">Z3 −</text>
   <circle cx="230" cy="275" r="4" fill="#ff8844" opacity="0.5"/>
 
   <!-- Zone 4 -->
   <rect x="75" y="292" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="305" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">7</text>
-  <text x="185" y="305" text-anchor="end" fill="#ff6633" font-size="10">Z4 L</text>
+  <text x="185" y="305" text-anchor="end" fill="#ff6633" font-size="10">Z4 +</text>
   <circle cx="230" cy="301" r="4" fill="#ff6633" opacity="0.8"/>
 
   <rect x="75" y="314" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="327" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">8</text>
-  <text x="185" y="327" text-anchor="end" fill="#ff6633" font-size="10">Z4 N</text>
+  <text x="185" y="327" text-anchor="end" fill="#ff6633" font-size="10">Z4 −</text>
   <circle cx="230" cy="323" r="4" fill="#ff6633" opacity="0.5"/>
 
   <!-- Zone 5 -->
   <rect x="75" y="340" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="353" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">9</text>
-  <text x="185" y="353" text-anchor="end" fill="#ee4422" font-size="10">Z5 L</text>
+  <text x="185" y="353" text-anchor="end" fill="#ee4422" font-size="10">Z5 +</text>
   <circle cx="230" cy="349" r="4" fill="#ee4422" opacity="0.8"/>
 
   <rect x="75" y="362" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="375" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">10</text>
-  <text x="185" y="375" text-anchor="end" fill="#ee4422" font-size="10">Z5 N</text>
+  <text x="185" y="375" text-anchor="end" fill="#ee4422" font-size="10">Z5 −</text>
   <circle cx="230" cy="371" r="4" fill="#ee4422" opacity="0.5"/>
 
   <!-- Zone 6 -->
   <rect x="75" y="388" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="401" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">11</text>
-  <text x="185" y="401" text-anchor="end" fill="#dd2200" font-size="10">Z6 L</text>
+  <text x="185" y="401" text-anchor="end" fill="#dd2200" font-size="10">Z6 +</text>
   <circle cx="230" cy="397" r="4" fill="#dd2200" opacity="0.8"/>
 
   <rect x="75" y="410" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="423" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">12</text>
-  <text x="185" y="423" text-anchor="end" fill="#dd2200" font-size="10">Z6 N</text>
+  <text x="185" y="423" text-anchor="end" fill="#dd2200" font-size="10">Z6 −</text>
   <circle cx="230" cy="419" r="4" fill="#dd2200" opacity="0.5"/>
 
   <!-- Separator line -->
@@ -111,7 +111,7 @@
 
   <rect x="75" y="484" width="30" height="18" rx="3" fill="#1e3a50" stroke="#3a7aaa" stroke-width="1"/>
   <text x="90" y="497" text-anchor="middle" fill="#7ecfff" font-size="10" font-weight="bold">14</text>
-  <text x="185" y="497" text-anchor="end" fill="#44ffcc" font-size="10">TC1 -</text>
+  <text x="185" y="497" text-anchor="end" fill="#44ffcc" font-size="10">TC1 −</text>
   <circle cx="230" cy="493" r="4" fill="#44ffcc" opacity="0.4"/>
 
   <!-- TC 2 -->
@@ -351,9 +351,9 @@
   <rect x="320" y="88" width="260" height="120" rx="5" fill="#0d1820" stroke="#2a4a5e" stroke-width="1"/>
   <text x="450" y="108" text-anchor="middle" fill="#7a9ab0" font-size="10" letter-spacing="2">LEGEND</text>
   <line x1="335" y1="125" x2="375" y2="125" stroke="#ffcc66" stroke-width="2"/>
-  <text x="385" y="129" fill="#cccccc" font-size="10">Heater Zone (L)</text>
+  <text x="385" y="129" fill="#cccccc" font-size="10">Heater Zone (+)</text>
   <line x1="335" y1="143" x2="375" y2="143" stroke="#ffcc66" stroke-width="2" opacity="0.4"/>
-  <text x="385" y="147" fill="#cccccc" font-size="10">Heater Zone (N)</text>
+  <text x="385" y="147" fill="#cccccc" font-size="10">Heater Zone (−)</text>
   <line x1="335" y1="161" x2="375" y2="161" stroke="#44ffcc" stroke-width="2"/>
   <text x="385" y="165" fill="#cccccc" font-size="10">TC J-type (+)</text>
   <line x1="335" y1="179" x2="375" y2="179" stroke="#44ffcc" stroke-width="2" opacity="0.35"/>