Too leger, so unstable and noisy disc reading

YES, I confirm, read blu-ray disc is like 4500, it is noisy like a scraping sound, even at 3m distance from the reader means that unpleasant noise. Nothing explosive because these drives either the 1500-4500 and 5500-weigh just 0.8kg, they are light weight. We opened a store a "1500" the electronic part on the right is very small and the drive part is totally plastic! this explains it, the noise in disc playback. Sony has improved positively in the line but it's too light stability, and unfortunately also to insert a USB key must hold if it does not stay in place at least to double-sided sticky below!. Conclusion, too light = noisy, unworthy of a true blu-ray player of yesteryear in this constructor declining unquestionably. Too bad Sony is not what it was.