Yea the Panaflos, i love em, i had to buy a fan controller because they got a bit too loud. My GF was complaining. Hah...didnt bug me at all. As for the method you described. Thats kinda what i have going on if you look at it. Only the pushing fan is mounted on the top. I think i need to lap them. The TT didnt seem to smooth on the bottom when i recieved it.
I've got 2 M1A Panaflos, not very loud but stiil audible.