Problem with series indicator stalk , advice appreciated

Evening , I've just replaced my series 3 indicator stalk , it was clicking and putting indicators on at random times, I've been monitoring the situation and have figured out what the problem is , on the new stalk the angle of the plastic arm is too low so everytime I turn the wheel whether indicators are on or not it hits the raised point , any ideas ? I thought i could use a hair drier to bend plastic slightly but am worried because its more than likely going to break
I've attached two pictures , they are the best I could get showing the difference between the two

The first picture is the original one , the second is the new one with the narrower gap

I would be really grateful of any advice

Thanks

Does the knob in the steering shaft screw in and out for adjustment, or just file a bit off the lobes on the indicator stalk