On the first post the OP said the seal was frazing (making dust). That means either the cylinder wall is rough and wearing the seal or the seal is breaking up. I can't see how a manufacturer can complain about his product failing after such a short time. Get your bits right and there won't be any complaints.
 
Isn't there a 5 year return on faulty goods (consumer act) bought in in the 70's
 

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