Emu XL-7 & MP-7 User's Group

Records grooves when playing live? Say you have a groove going and 
playing some leads with a keyboard controller and you play something 
you liked.... Is the record while playing back on the Emu station 
fluid enough to do that on the go while in a middle of a live set? or 
do you need to go back and edit in most cases to make the playback of 
the phrase right?

thanks in advance.