I will be using an 1820m for a recording in the very near future and just stumbled on the fact that only the first two inputs have pre's built in... submixing a drumkit is not my personal idea of fun, so would it be ok to only use pre's for two of the mics? I'll be using four mics, two of which used for OH's, so I'm guessing that the snare and kick are the lucky winners in the Pre lottery... or do I have to suck it up and embrace the nightmare that is submixing? I hate not being able to turn up each component as I see fit... or... I could submix the overheads since they are supposed to be about the same volume anyway and run them through the pre along with the kick, since the overheads will pick up a bit of snare and toms anyway, right? would that be better? that way a bit more of the kit gets some pre-love am I just making a big deal about nothing? I haven't heard glowing reviews of the 1820m pre's anyway, so is it not gonna make that much of a difference afterall?