I had my MG4 serviced twice with them fitted. I also had a lengthy investigation carried out by the dealer about a charging issue which meant the car was back and forth to the dealers over several months and not once did the mention the gas struts or the stainless steel kick plates or the non SAIC Bosh wipers.That's my worry, I'm thinking you have to either leave the ball joint thing in (which a service might not like) or take it out completely, losing the nut.