Yeah I used plastic adapters there are plenty on amazon and car audio shops(you will need adapters for the rear speakers aswell). I was thinking if you use universal MDF adapters instead and drill your owns holes maybe the rattle wont be that bad. I have a Sony BT stereo. All original CD, Stereo, speakers, amp, sub etc is all gone was a non working Bose system when I bought the car(dead stock stereo/headunit). In other words I've redone everything including wiring also used silent coat dynomat throughout the car and also have a mono amp for the sub and the 4 ch amp for the speakers one is located on each side behind the rear passenger covers like in Andymacs instructions. I only have pictures of the Sub install but its better then nothing.