console has some issues! the solo buss work's, but when you release the channel from solo, it take's about 4 or 5 seconds to come back to the stereo buss. I think it is a cap(the only cap) in the solo sense circuit, but I am no electronics genius. I was also looking to do some upgrades to 8 or 16 of the pre's. I have heard of people doing this with great success on this board, but don't know where to begin. Thanks for any info!!