if you call hpi they will send you a new one . They might ask you to send your broken one to see if they can fix it . That's what I did and recived a roto 2 back
it's to increase compression. It's a way to regain lost power that happens to all sleeves overtime
I would leave pinching a sleeve to the pros. Not sure if there is a way you can do it yourself. Or if it would even be worth it.
nasty savage
this is my littler brothers savage its got integy ajustable alumiun a arms fire ball z tires jr metal stearing servo integy gas tank cover and venom tempature guage