I don't copy/paste/shift anything.
About the only thing I do that to with any regularity....is my Hammond organ track, and only when I record a single organ track. Sometimes I record multiple organ tracks...maybe doing the right hand (melody lines) as one track and the left hand (chords) as another...that way I can place/pan and process them separately (I've also used that approach on piano tracks at times)....
...but when I record just a single organ track, where all the organ playing is contained on that one track (this mostly applies to chords)...I'll split/shift/pan....and it actually works really well because of vibrato/chorus from the organ and the amount of shift/delay I use between the tracks.
I mentioned this technique once before in some similar thread. The trick that makes it really work is to take the second track and shift it only by HALF of the vibrato wave....so that where the vibrato is going UP on the first track, you place the second track so it's going DOWN in that spot. Now you pan them hard L/R, and you end up with a great Leslie vibe, because the vibrato now oscillates L/R.
If you collapse to mono, they still work...
Yeah...if you have a real Leslie, and you want to set up a pair of stereo room mics....etc...you can also get there, but I got no Leslie, and I don't care for most of the "rotary" FX boxes out there, so I use this split/shift technique.
Try it....it really works well on organ chord tracks that are rich with vibrato.
This is how to line up the two tracks:
..../\/\/\/\/\/\/\...
...../\/\/\/\/\/\/...
You can of course use some different delay shift between the tracks, but it's only when you get them in a centered, opposing UP/DOWN position and then pan them hard L/R do you get the real strong L/R vibrato throb going. It's almost like being in the room with a Leslie cab and feeling the rotor's effect in the room.