So p183 doors doesn´t fit the p182, how about the 5,25 covers on the p183 ? will those fit the p182 ?

I can attest that the SlipStream 1200 rpm model I bought has a very pronounced vibration when mounted horizontally (just what I expected from a sleeve bearing fan) even at 5v, while my Pabst syntec sleeve bearing fan even at 12v mounted horizontally doesn't approach the level of vibration the Slips...

I have had similar although not as extreme problems with my HD3870, after removing the plastic base cover i noticed that the base of the S1 would not align properly with the GPU if i used the plastic supports, so i just skipped those, so far so good :) btw, i dont have a fan mounted on the S1 Could ...