What do you think it would take to get Mesa-Boogie to offer a rack-mount version of the 400+ preamp section? Ask them, I suppose. That would totally rock! If they did that, I think I'd have to start a preamp collection! It would have so much ROCK that all the others would tap out in submission from the sonic rear-naked choke that it would put on 'em. 'cept the Alembic, of course!