diff --git a/stimBuffApis/livoxGen1/collateDgrams.cl b/stimBuffApis/livoxGen1/collateDgrams.cl
index 67211d4..60e0d32 100644
--- a/stimBuffApis/livoxGen1/collateDgrams.cl
+++ b/stimBuffApis/livoxGen1/collateDgrams.cl
@@ -1,3 +1,11 @@
+// Debug macro: define DEBUG_COLLATE_DGRAMS to enable printf statements
+#define DEBUG_COLLATE_DGRAMS
+#ifdef DEBUG_COLLATE_DGRAMS
+#define DBG_PRINTF(...) printf(__VA_ARGS__)
+#else
+#define DBG_PRINTF(...)
+#endif
+
 // Helper function to read a little-endian int32 from unaligned memory
 inline int readInt32LE(__global uchar* ptr)
 {
@@ -57,12 +65,21 @@ __kernel void collate(
 			int z_mm = readInt32LE(pointPtr + 8);
 			uchar reflectivity = pointPtr[12];
 
+			DBG_PRINTF("collate[slot=%u,point=%u]: x_mm=%d, y_mm=%d, z_mm=%d, reflectivity=%d\n",
+				slotIndex, i, x_mm, y_mm, z_mm, reflectivity);
 			// Convert to PointXYZI (meters, float)
 			float x = (float)x_mm / 1000.0f;
 			float y = (float)y_mm / 1000.0f;
 			float z = (float)z_mm / 1000.0f;
 			float intensity = (float)reflectivity;
 
+			// Print intensity if above 5
+			if (intensity > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, i, intensity);
+			}
+
 			// Write to collation buffer
 			uint offset = collationBaseOffset + (i * FLOATS_PER_POINT);
 			collation[offset + 0] = x;
@@ -86,12 +103,21 @@ __kernel void collate(
 			uchar reflectivity = pointPtr[12];
 			// tag at offset 13 is ignored
 
+			DBG_PRINTF("collate[slot=%u,point=%u]: x_mm=%d, y_mm=%d, z_mm=%d, reflectivity=%d\n",
+				slotIndex, i, x_mm, y_mm, z_mm, reflectivity);
 			// Convert to PointXYZI (meters, float)
 			float x = (float)x_mm / 1000.0f;
 			float y = (float)y_mm / 1000.0f;
 			float z = (float)z_mm / 1000.0f;
 			float intensity = (float)reflectivity;
 
+			// Print intensity if above 5
+			if (intensity > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, i, intensity);
+			}
+
 			// Write to collation buffer
 			uint offset = collationBaseOffset + (i * FLOATS_PER_POINT);
 			collation[offset + 0] = x;
@@ -124,6 +150,13 @@ __kernel void collate(
 			float z1 = (float)z1_mm / 1000.0f;
 			float intensity1 = (float)reflectivity1;
 
+			// Print intensity if above 5
+			if (intensity1 > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, pointIndex, intensity1);
+			}
+
 			uint offset1 = collationBaseOffset
 				+ (pointIndex * FLOATS_PER_POINT);
 			collation[offset1 + 0] = x1;
@@ -144,6 +177,13 @@ __kernel void collate(
 			float z2 = (float)z2_mm / 1000.0f;
 			float intensity2 = (float)reflectivity2;
 
+			// Print intensity if above 5
+			if (intensity2 > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, pointIndex, intensity2);
+			}
+
 			uint offset2 = collationBaseOffset
 				+ (pointIndex * FLOATS_PER_POINT);
 			collation[offset2 + 0] = x2;
@@ -177,6 +217,13 @@ __kernel void collate(
 			float z1 = (float)z1_mm / 1000.0f;
 			float intensity1 = (float)reflectivity1;
 
+			// Print intensity if above 5
+			if (intensity1 > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, pointIndex, intensity1);
+			}
+
 			uint offset1 = collationBaseOffset
 				+ (pointIndex * FLOATS_PER_POINT);
 			collation[offset1 + 0] = x1;
@@ -197,6 +244,13 @@ __kernel void collate(
 			float z2 = (float)z2_mm / 1000.0f;
 			float intensity2 = (float)reflectivity2;
 
+			// Print intensity if above 5
+			if (intensity2 > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, pointIndex, intensity2);
+			}
+
 			uint offset2 = collationBaseOffset
 				+ (pointIndex * FLOATS_PER_POINT);
 			collation[offset2 + 0] = x2;
@@ -217,6 +271,13 @@ __kernel void collate(
 			float z3 = (float)z3_mm / 1000.0f;
 			float intensity3 = (float)reflectivity3;
 
+			// Print intensity if above 5
+			if (intensity3 > 5.0f)
+			{
+				DBG_PRINTF("collate[slot=%u,point=%u]: intensity=%.1f\n",
+					slotIndex, pointIndex, intensity3);
+			}
+
 			uint offset3 = collationBaseOffset
 				+ (pointIndex * FLOATS_PER_POINT);
 			collation[offset3 + 0] = x3;
diff --git a/stimBuffApis/livoxGen1/slotCompactor.cl b/stimBuffApis/livoxGen1/slotCompactor.cl
index 7ad3ba7..8bb6538 100644
--- a/stimBuffApis/livoxGen1/slotCompactor.cl
+++ b/stimBuffApis/livoxGen1/slotCompactor.cl
@@ -1,3 +1,10 @@
+// Debug macro: define DEBUG_SLOT_COMPACTOR to enable printf statements
+#ifdef DEBUG_SLOT_COMPACTOR
+#define DBG_PRINTF(...) printf(__VA_ARGS__)
+#else
+#define DBG_PRINTF(...)
+#endif
+
 __kernel void slotCompactor(
 	__global uchar* assembly,
 	uint numSlots,
@@ -14,21 +21,36 @@ __kernel void slotCompactor(
 	// 2. Exit early once we've seen nSucceeded non-dummy slots
 	// 3. Exit early once we've moved nFailed dummy slots
 
+	DBG_PRINTF("slotCompactor: KERNEL STARTED\n");
+	DBG_PRINTF("slotCompactor: numSlots=%u, slotStride=%u, slotSize=%u, firstSlotOffset=%u, nSucceeded=%u\n",
+		numSlots, slotStride, slotSize, firstSlotOffset, nSucceeded);
+
 	uint nFailed = numSlots - nSucceeded;  // Calculate number of failed slots
 	uint nonDummiesSeen = 0;  // Track how many non-dummy slots we've seen
 	uint dummiesMoved = 0;     // Track how many dummy slots we've moved
 
+	DBG_PRINTF("slotCompactor: nFailed=%u\n", nFailed);
+
 	// Initialize rightmostNonDummy to start from the end
 	// We'll decrement it each time we use it to avoid re-selecting the same slot
 	uint rightmostNonDummy = numSlots - 1;
 
 	// Process slots from beginning to end
+	DBG_PRINTF("slotCompactor: Starting loop, numSlots=%u\n", numSlots);
 	for (uint i = 0; i < numSlots; ++i)
 	{
 		// Optimization 2: Exit early once we've seen nSucceeded non-dummy slots
-		if (nonDummiesSeen >= nSucceeded) { break; }
+		if (nonDummiesSeen >= nSucceeded) {
+			DBG_PRINTF("slotCompactor: Early exit at i=%u, nonDummiesSeen=%u >= nSucceeded=%u\n",
+				i, nonDummiesSeen, nSucceeded);
+			break;
+		}
 		// Optimization 3: Exit early once we've moved nFailed dummy slots
-		if (dummiesMoved >= nFailed) { break; }
+		if (dummiesMoved >= nFailed) {
+			DBG_PRINTF("slotCompactor: Early exit at i=%u, dummiesMoved=%u >= nFailed=%u\n",
+				i, dummiesMoved, nFailed);
+			break;
+		}
 
 		// Calculate slot address
 		__global uchar* slotAddr = assembly + firstSlotOffset
@@ -38,6 +60,11 @@ __kernel void slotCompactor(
 		bool isDummy = (slotAddr[0] == 0xFF) && (slotAddr[1] == 0xFF)
 			&& (slotAddr[2] == 0xFF) && (slotAddr[3] == 0xFF);
 
+		if (i < 5 || i == numSlots - 1) {
+			DBG_PRINTF("slotCompactor: i=%u, slot[0-3]=0x%02X%02X%02X%02X, isDummy=%d\n",
+				i, slotAddr[0], slotAddr[1], slotAddr[2], slotAddr[3], isDummy ? 1 : 0);
+		}
+
 		// Early continue for non-dummy slots (already in the right place)
 		if (!isDummy)
 		{
@@ -71,6 +98,7 @@ __kernel void slotCompactor(
 		// If we found a non-dummy slot to the right, copy it here
 		if (foundNonDummy)
 		{
+			DBG_PRINTF("slotCompactor: Moving slot from %u to %u\n", rightmostNonDummy, i);
 			__global uchar* srcAddr = assembly + firstSlotOffset
 				+ (rightmostNonDummy * slotStride);
 
@@ -89,6 +117,13 @@ __kernel void slotCompactor(
 
 			++dummiesMoved;
 			++nonDummiesSeen;  // We just moved a non-dummy to this position
+		} else {
+			if (i < 5) {
+				DBG_PRINTF("slotCompactor: i=%u, no non-dummy found to move\n", i);
+			}
 		}
 	}
+	DBG_PRINTF("slotCompactor: Loop complete, nonDummiesSeen=%u, dummiesMoved=%u\n",
+		nonDummiesSeen, dummiesMoved);
+	DBG_PRINTF("slotCompactor: KERNEL FINISHED\n");
 }