diff --git a/ADIS_tinyK22_SplitFlap/source/application.c b/ADIS_tinyK22_SplitFlap/source/application.c
index 7b53a66..6369d8e 100644
--- a/ADIS_tinyK22_SplitFlap/source/application.c
+++ b/ADIS_tinyK22_SplitFlap/source/application.c
@@ -40,7 +40,7 @@ void App_Init(void){
 	LED_blue = McuLED_InitLed(&config);
 
 	configureSplitflaps();
-	MultiSplitFlap_Init();
+	MultiSplitFlap_Init(2);
 	MultiSplitFlap_AddFlap(splitflap0);
 	MultiSplitFlap_AddFlap(splitflap1);
 }
diff --git a/ADIS_tinyK22_SplitFlap/source/multi-splitflap.c b/ADIS_tinyK22_SplitFlap/source/multi-splitflap.c
index dfdd496..d8892c1 100644
--- a/ADIS_tinyK22_SplitFlap/source/multi-splitflap.c
+++ b/ADIS_tinyK22_SplitFlap/source/multi-splitflap.c
@@ -5,41 +5,63 @@
  *      Author: jonas
  */
 
+#include <stdio.h>
+#include <stdbool.h>
 #include "multi-splitflap.h"
 #include "fsl_debug_console.h"
 
 static dict_t **flapDict;
-static uint8_t amountOfFlaps = 0;
+static uint8_t numberOfFlaps = 0;
+static uint8_t addedFlaps = 0;
+static const uint8_t BYTES_PER_KEY = 3;
+static char* flapKeys[] = {};
 
-void MultiSplitFlap_Init(void){
-	amountOfFlaps = 0;
+void initFlapKeys(uint8_t numberOfFlaps);
+
+void MultiSplitFlap_Init(uint8_t numOfFlaps){
+	numberOfFlaps = numOfFlaps;
+	addedFlaps = 0;
 	flapDict = dictAlloc();
 	((dict_t*)flapDict)->key=NULL;
 	((dict_t*)flapDict)->value=NULL;
 	((dict_t*)flapDict)->next=NULL;
+	initFlapKeys(numberOfFlaps);
+}
+
+void initFlapKeys(uint8_t numberOfFlaps){
+	for (uint8_t i = 0; i < numberOfFlaps; ++i) {
+		/* get a memory place for the key */
+#if SPLITFLAP_CONFIG_USE_FREERTOS_HEAP
+		flapKeys[i] = pvPortMalloc(sizeof(BYTES_PER_KEY));
+#else
+		if((flapKeys[i] = malloc(BYTES_PER_KEY)) == NULL){
+			PRINTF("Reserving memory for flap num. %i failed!:\n", i);
+		}
+		sprintf(flapKeys[i], "%i", i);
+#endif
+	}
 }
 
 void MultiSplitFlap_Deinit(void){
 	dictDealoc(flapDict);
-	amountOfFlaps = 0;
+	addedFlaps = 0;
+	numberOfFlaps = 0;
 }
 
-uint8_t MultiSplitFlap_GetAmountOfSplitFlaps(void){
-	return amountOfFlaps;
+uint8_t MultiSplitFlap_GetAmountOfAddedSplitFlaps(void){
+	return addedFlaps;
 }
 
 void MultiSplitFlap_AddFlap(SF_Handle_t splitflap){
-	PRINTF("Adding split flap to multi splitflap combination:\n");
-	addItem(flapDict, (char*)&amountOfFlaps, (SF_Handle_t*)splitflap);
-	//TODO  probably starting with 0 does not work since its a pointer to the number 0
-	PRINTF("Added flap nr. %i. There are now %i flaps.\n", amountOfFlaps, ++amountOfFlaps);
+	PRINTF("Adding split flap to multi splitflap combination...\n");
+	addItem(flapDict, flapKeys[addedFlaps], (SF_Handle_t*)splitflap);
+	PRINTF("Added flap nr. %i/%i.\n", addedFlaps+1, numberOfFlaps);
+	addedFlaps++;
 }
 
 void MultiSplitFlap_Display(char* sentence[]){
-	SF_Handle_t* sfHandle0 = (SF_Handle_t*)(getItem(*flapDict, (char*)0));
-	SF_Handle_t* sfHandle1 = (SF_Handle_t*)(getItem(*flapDict, (char*)1));
-	SF_t* sf0 = (SF_t*)sfHandle0;
-	SF_t* sf1 = (SF_t*)sfHandle1;
+	SF_t* sf0 = (SF_t*)(SF_Handle_t)(getItem(*flapDict, flapKeys[0]));
+	SF_t* sf1 = (SF_t*)(SF_Handle_t)(getItem(*flapDict, flapKeys[1]));
 	int32_t test = McuULN2003_GetPos(sf1->motor);
 }
 
diff --git a/ADIS_tinyK22_SplitFlap/source/multi-splitflap.h b/ADIS_tinyK22_SplitFlap/source/multi-splitflap.h
index cc38630..a94f22d 100644
--- a/ADIS_tinyK22_SplitFlap/source/multi-splitflap.h
+++ b/ADIS_tinyK22_SplitFlap/source/multi-splitflap.h
@@ -10,8 +10,9 @@
 
 #include "splitflap.h"
 
-/* initialize dictionary */
-void MultiSplitFlap_Init(void);
+/* initialize dictionary
+ * numberOfFlaps: Number of flaps to be added to the combination */
+void MultiSplitFlap_Init(uint8_t numOfFlaps);
 
 /* de-initialize: deallocate memory etc. */
 void MultiSplitFlap_Deinit(void);
@@ -25,6 +26,6 @@ void MultiSplitFlap_AddFlap(SF_Handle_t splitflap);
 void MultiSplitFlap_Display(char* sentence[]);
 
 /* returns the amount of registered split flap displays in the combination */
-uint8_t MultiSplitFlap_GetAmountOfSplitFlaps(void);
+uint8_t MultiSplitFlap_GetAmountOfAddedSplitFlaps(void);
 
 #endif /* MULTI_SPLITFLAP_H_ */