Le 4 has 8 sends per track (don't remember what LE1 had and not used LE5) Le1 only let you have 2 inserts, le4 lets you have 8, and LE5 allows. I'm going to assume the limitation applies to outputs as well. Le1 and Le4 only let you record 8 tracks at once, Le5 lets you do 16.
48 mono or stereo tracks, just tried this in version 4 it will not let you add more than 48.
