not sure on MCW30 since i don't own one of these

Apogee that's default springs etc.. except one of the threads included is longer than the other 3 ??? so used extra white spacers etc to fill the extra length heh

Revage, the top down pic might make the position of the TT ESII deceptive, if you turn it 90 degrees either way you have a little less room between 2 cards and greater chance the TT ESII to touch back side of the 2nd card - don't want to short the card do we

Not sure on 8800GTX as i don't own one and not sure how far the heatsink extends compared to 8800GTS... if the heatsink is same size and length and only 8800GTX PCB is longer then maybe ?