I am looking at an older 488 and it has two 1/4 sends for effects. An fx pot on each channel and 2 master fx return pots. But no fx return input!! Huh? is this some kind of Tascam trickery?? I had a 244 and it was a workhorse, but alas it has moved on to the great multitracker beyond...but it sho nuff had a fx return!!! What am I missing? help me out and thanks..