Question preset load and gain for belt tension ?

i did make lebois seat belt tensior with the 24 volt dc motor . i got 2 arduinos driving for now 5 motors . seat belt is onto arduino nr 2 axis 2b with a potmeter 10 k . working nice but would like to ad the function for preload and gain settings ore a switch for of/on . i got a arduino sketch but it is for servo motors .
what i wanting to do
1 . preload setting to adjust the start position of the tension with a potmeter
2 . gain setting to adjust when playing . the force that is pulled with a potmeter adjustable when playing in game
3 . switch to turn of/on the complete tension motion .
4. how to set this up? adding a nr3 arduino card ? with a skech onto it only for belt tension ? is it possible in simtools to setup a motion gain with a potmeter/ remote keyboard keys ? . turnig in game playing a potmeter/keyboardkey so all axis motion gain are getting more ore less ?

i got lebois arduino seatbelt tension skech but it is for servo motors ? flypt setup ? could this make working for simtools setup ? lebois smartbox for belt

// Licence CC BY NC SA
// www.lebois-racing.fr/en
// Use native USB

//#define EcoMode //The servo driver will be turned down when their is no torque to apply.

#define NATIVEUSBPORT //it's not reliable when using the programming port

int TorqueTarget = 0;
int gain = 4095;
int preload = 1;

int EnablePin = A0;

void setup() {
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
digitalWrite(6, HIGH);
digitalWrite(7, HIGH);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
enableServo();
delay(3000); //safetys delay to flash the board

#ifdef NATIVEUSBPORT
SerialUSB.begin(115200); //To communicate with FlyPT. In FlyPT, put that number in "Serial speed".
#else
Serial.begin(115200);
#endif

analogWriteResolution(12); //if you have an error here, it's because you didn't select the right Arduino
analogReadResolution(12);
pinMode(DAC0, OUTPUT); //to avoid wiring problems, both pins are used
pinMode(DAC1, OUTPUT);
analogWrite(DAC0, 0);
analogWrite(DAC1, 0);
digitalWrite(12, HIGH);
digitalWrite(13, HIGH);
}

void loop() {
SerialReaderB();

int target = min(preload + TorqueTarget * gain / 4095, 4095);

#ifdef EcoMode
if (TorqueTarget == 0 && gain == 0) {
disableServo();
} else {
enableServo();
#ifdef PotentiometerMode
analogWrite(DAC0, target);
analogWrite(DAC1, target);
#else
analogWrite(DAC0, target);
analogWrite(DAC1, target);
#endif
}
#else
analogWrite(DAC0, target);
analogWrite(DAC1, target);
#endif
}

void SerialReaderB() {
int rawValue = 0;
while (SerialUSB.available()) { //To communicate with FlyPT. In FlyPT, put that number in "Serial speed".
char incomingChar = SerialUSB.read();

if (incomingChar == 'A') {
enableServo();
} else if (incomingChar == 'B') {
if (SerialUSB.available() >= 2) {
uint8_t valueMSB = SerialUSB.read();
uint8_t valueLSB = SerialUSB.read();
TorqueTarget = (uint16_t)valueMSB << 8 | (uint16_t)valueLSB;
}
} else if (incomingChar == 'C') {
disableServo();
}
}
}

void enableServo() {
digitalWrite(EnablePin, LOW);
}
void disableServo() {
digitalWrite(EnablePin, HIGH);
analogWrite(DAC0, 0);
analogWrite(DAC1, 0);
}