Double checking, but when using another unit that is not a 3000 you do lose some of the direct functionality. The tri band for instance won't show if the other player can't display it, so it reverts to a blue waveform. Also the 700 can't output the same data as the 300 so you lose the enlarged waveform comeing from the 3000 and the stackable waveform going to the 3000. Even with these changes the linking should be smooth and easy to get going.
If this is a firmware change down the road, we'll announce it here.