I’m so sorry I missed this!
in default config, cranes is two separate voices that have their own buffers and loop points. grid control can match loop points back and forth between the buffers.
currently, L input records into buffer 1 and R input records into buffer 2.
you can overwrite/overdub each voice, one buffer at a time – the buffer you’re writing into and controlling loop points for is selected with a long press on KEY 1.
in the latest beta (posted upthread), the performer can toggle the voices between having two distinct buffers and sharing a single buffer.
hope this helps, please let me know any additional questions! 