Yeah, Scott, I was worried too. I still am a bit worried actually. You can still hear faint mech noises from the spider area in some drivers more than others. One driver developed a bit of a scrape/clack when I tilted it a bit to clear the pole vent. I was so tired at that point I just said F' it and went to bed.
Even if all the drivers are good I'm a bit concerned that 1KW per driver will be too little. These things soaked up 250W free air with less than an inch of excursion at around 40Hz and clipped my Model Three. I moved them to my Hypex at 400 W and got just a couple Db more before that clipped. My Crown will do 1KW per driver all day long, but if it's clipping the drivers are at risk and that's just not acceptable.