The digimax/octapre cannot be clocked from the 002 so they have to be master clock , or they need an external clock like the Big Ben or the rosetta. Using the pre as clock can creat a huge problem if you don't notice it resets and your 48 k session file is actually recorded at 44.1. Been there done that. Insteead of buying two seperate pieces have you considered the Rosetta 800??I upgraded my Alesis AI-3 to a Rosetta 800 with my 002R. Big difference. Also use the Rosetta for clock and for monitoring, the 002R I/O is only used on drum tracking days. I noticed a huge change with the output converters (width and depth) and then changed the clock to the apogee and it got better yet. They also have a reasonably cheap calibration mod that allows you to set it all up at the semi pro levels of -16dbfs= 1 volt if you need to. The big ben is another notch above the Rosetta, but in the bang for the buck dept. the rosetta rocks.