Yes I’ve done it many times too, even slaved.
If you want to overdub INAB
T1 = Flex playing Recording 1
Timestretch off.
Recording Setup :
InAB AB
Src3 = T1
Rec, done.
Beware after 20 passes with filter on, weird behaviours. Much more passes if you set filter FX to None. Beware with LOFI too.
You can record several tracks, Thru, etc with SRC3 = Cue.
Main problem : Clicks at the beginning. Attack = 1 helps. Best workaround : add hihats!