I am planning on buying the MB Quart PCE 216 + iaperformance thick spacers for the front doors. I've read from December on here that people had bad vibration problems with the same set up. Were the spacers fixed after this and has anyone installed them since with this setup? Also do I need to buy the tweeter brackets or are they on the door already? I'm sorry if this has been beat to death but i'd like to make sure i got everythign ready so I have no suprises once i yank the door panels in the middle of winter.