I bought this item.  Cant reveal company because of legal reasons.  BUT.   The gas 550 did not work out of the box.  There was three things wrong with it.  The first main thing was the clutch.  It took me three weeks to get it.  Not to mention they respond to your claims about once a week to give time for the warrenty to run out.  They ignored my replys about other two problems and a month and a half still no response.  I made a claim through credit card company.  They called seller and my claim history disappeared and they made up a story about what happened.  Im out 500 bucks.  But its not over yet.  Your best bet is that you better not have any problems for 30 days if you buy it.