diff --git a/main.cpp b/main.cpp
index 6c644a5..c2ea2c0 100644
--- a/main.cpp
+++ b/main.cpp
@@ -909,11 +909,11 @@ void loadPreset(int preset) {
     auto placeOp = [&](int x, int y, float ratio, float att, float rel) {
         // Layout:
         // (x, y)   : G-IN (South)
-        // (x, y+1) : WIRE (East)
-        // (x+1, y+1): ATT (East)
+        // (x, y+1) : WIRE (East) -> Feeds envelope chain
+        // (x+1, y+1): ATT (East) ->
         // (x+2, y+1): REL (East)
-        // (x+3, y+1): VCA (South)
-        // (x+3, y) : OSC (South)
+        // (x+3, y+1): VCA (South) -> Output is here. Gets audio from OSC, gain from envelope.
+        // (x+3, y) : OSC (South) -> Audio source. Gets FM from its back (x+3, y-1).
 
         engine.grid[x][y].type = SynthEngine::GridCell::GATE_INPUT; engine.grid[x][y].rotation = 2; // S
         engine.grid[x][y+1].type = SynthEngine::GridCell::WIRE; engine.grid[x][y+1].rotation = 1; // E
@@ -932,8 +932,10 @@ void loadPreset(int preset) {
     };
 
     int sinkY = SynthEngine::GRID_H - 1;
+    int sinkX = SynthEngine::GRID_W / 2;
 
-    if (preset == 1) {
+    // Preset 0 is blank
+    if (preset == 1) { // Based on DX7 Algorithm 32
         // Algo 32: Parallel Operators
         // 6 Ops in parallel feeding the sink
         // We'll place 3, and wire them
@@ -966,7 +968,7 @@ void loadPreset(int preset) {
             engine.grid[6][y].type = SynthEngine::GridCell::WIRE; engine.grid[6][y].rotation = 2;
         }
 
-    } else if (preset == 2) {
+    } else if (preset == 2) { // Based on DX7 Algorithm 1
         // Algo 1: Stack (FM)
         // Op 2 Modulates Op 1
         // Op 1 is Carrier
@@ -989,6 +991,78 @@ void loadPreset(int preset) {
         for(int y=5; y<sinkY; ++y) {
             engine.grid[6][y].type = SynthEngine::GridCell::WIRE; engine.grid[6][y].rotation = 2;
         }
+    } else if (preset == 3) { // Based on DX7 Algorithm 2
+        // Op 2 -> Op 1 (Carrier)
+        // Op 3 (Carrier)
+
+        // Carrier 1 stack (output at 7,3)
+        placeOp(4, 2, 1.0f, 0.01f, 0.8f);
+        placeOp(4, 0, 2.0f, 0.01f, 0.2f);
+
+        // Carrier 2 (output at 3,1)
+        placeOp(0, 0, 1.0f, 0.01f, 0.5f);
+
+        // --- Wiring to Sink ---
+        // Path for Carrier 1 (from 7,3)
+        engine.grid[7][4].type = SynthEngine::GridCell::WIRE; engine.grid[7][4].rotation = 3; // W, to (6,4)
+        
+        // Path for Carrier 2 (from 3,1)
+        engine.grid[3][2].type = SynthEngine::GridCell::WIRE; engine.grid[3][2].rotation = 1; // E, to (4,2)
+        engine.grid[4][2].type = SynthEngine::GridCell::WIRE; engine.grid[4][2].rotation = 1; // E, to (5,2)
+        engine.grid[5][2].type = SynthEngine::GridCell::WIRE; engine.grid[5][2].rotation = 1; // E, to (6,2)
+        engine.grid[sinkX][2].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][2].rotation = 2; // S, to (6,3)
+        engine.grid[sinkX][3].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][3].rotation = 2; // S, to (6,4)
+
+        // Mix point at (6,4) - WIREs sum inputs automatically
+        engine.grid[sinkX][4].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][4].rotation = 2; // S
+
+        // Funnel from mix point down to sink
+        for(int y=5; y<sinkY; ++y) {
+            engine.grid[sinkX][y].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][y].rotation = 2; // S
+        }
+    } else if (preset == 4) { // Based on DX7 Algorithm 4
+        // Op 3 -> Op 2 -> Op 1 (Carrier)
+        placeOp(4, 4, 1.0f, 0.01f, 0.8f); // Carrier Op1, out at (7,5)
+        placeOp(4, 2, 2.0f, 0.01f, 0.2f); // Modulator Op2, out at (7,3)
+        placeOp(4, 0, 4.0f, 0.01f, 0.1f); // Modulator Op3, out at (7,1)
+
+        // Wire Carrier output to sink
+        engine.grid[7][6].type = SynthEngine::GridCell::WIRE; engine.grid[7][6].rotation = 3; // W
+        engine.grid[sinkX][6].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][6].rotation = 2; // S
+
+        // Funnel down to sink
+        for(int y=7; y<sinkY; ++y) {
+            engine.grid[sinkX][y].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][y].rotation = 2; // S
+        }
+    } else if (preset == 5) { // Based on DX7 Algorithm 5
+        // Op 4 -> Op 3 -> Op 2 (Carrier)
+        // Op 1 (Carrier)
+
+        // Carrier stack (output at 7,5)
+        placeOp(4, 4, 1.0f, 0.01f, 0.8f);
+        placeOp(4, 2, 2.0f, 0.01f, 0.2f);
+        placeOp(4, 0, 4.0f, 0.01f, 0.1f);
+
+        // Parallel carrier (output at 3,1)
+        placeOp(0, 0, 0.5f, 0.01f, 0.5f);
+
+        // --- Wiring to Sink ---
+        engine.grid[7][6].type = SynthEngine::GridCell::WIRE; engine.grid[7][6].rotation = 3; // W, to (6,6)
+        engine.grid[3][2].type = SynthEngine::GridCell::WIRE; engine.grid[3][2].rotation = 2; // S to (3,3)
+        engine.grid[3][3].type = SynthEngine::GridCell::WIRE; engine.grid[3][3].rotation = 1; // E to (4,3)
+        engine.grid[4][3].type = SynthEngine::GridCell::WIRE; engine.grid[4][3].rotation = 1; // E to (5,3)
+        engine.grid[5][3].type = SynthEngine::GridCell::WIRE; engine.grid[5][3].rotation = 1; // E to (6,3)
+        engine.grid[sinkX][3].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][3].rotation = 2; // S to (6,4)
+        engine.grid[sinkX][4].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][4].rotation = 2; // S to (6,5)
+        engine.grid[sinkX][5].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][5].rotation = 2; // S to (6,6)
+        
+        // Mix point at (6,6)
+        engine.grid[sinkX][6].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][6].rotation = 2; // S
+
+        // Funnel from mix point down to sink
+        for(int y=7; y<sinkY; ++y) {
+            engine.grid[sinkX][y].type = SynthEngine::GridCell::WIRE; engine.grid[sinkX][y].rotation = 2; // S
+        }
     }
 }
 
@@ -1226,10 +1300,10 @@ int main(int argc, char* argv[]) {
                     } else if (e.key.keysym.scancode == SDL_SCANCODE_DELETE) {
                         clearGrid();
                     } else if (e.key.keysym.scancode == SDL_SCANCODE_PAGEUP) {
-                        current_preset = (current_preset + 1) % 3;
+                        current_preset = (current_preset + 1) % 6; // Increased number of presets
                         loadPreset(current_preset);
                     } else if (e.key.keysym.scancode == SDL_SCANCODE_PAGEDOWN) {
-                        current_preset = (current_preset - 1 + 3) % 3;
+                        current_preset = (current_preset - 1 + 6) % 6; // Increased number of presets
                         loadPreset(current_preset);
                     } else if (e.key.keysym.scancode == SDL_SCANCODE_M) {
                         auto_melody_enabled = !auto_melody_enabled;