For the ACER bought BD 9500 due to the detailed pre-review. And I must say, did everything right. Only Acer has the heavy 9500BD 3mm thread donated - the appropriate screws are not, of course. And so you have the hardware store large washers (fender washers) procure, and M3 screws betw. Min. 15 - max. 25mm Länhge. Solid looks different - but that's an Acer problem. The holder is trustworthy enough. However, a star deduction: The thread in the cast-aluminum wings is very easy to over tighten! So be careful, better use a small Phillips screwdriver to not be able to transmit as much power. However, in the worst case can be a nut (M5) to put a makeshift safe. Maybe art could recut a thread M6. This is then broken not so fast. So tighten with feeling - then everything is supi ...