I was going to get this DVD player at an excellent price but I read on a foreign hi-fi magazine a letter from a reader who complained that his Tosh made a strange noise on the first two or three tracks of any CD he played. He got an exchange, but the new unit vibrated too. Then the dealer told him that there was some coupling problem. Apparently the only solution was to sand the inside ring of all CDs. Please can you confirm any of this? Thanks a lot.