1. The Control 24 is an ethernet-based controller. It doesn't depend on the interface at all (MBox, 002, 002 Rack, HD, etc). 2. You can't "stack" LE interfaces, they are not upgradeable. If you need more than 16 inputs, you'll have to go to HD. 3. Sure - an 002 LE rig can track 16 tracks at once (24 bit) easily. The eight analog inputs handle eight, and the ADAT lightpipe I/O can do the other eight inputs (provided you purchase something like a Focusrite OctoPre, or another external A-to-D converter that has lightpipe outs) 4. Should be pretty easy...the converters on the 002 stuff are fine.... S..