NickD
2
Could you not use a spare pattern with a trig to start playback near the end, and edit while that’s looping? Alternatively, a favourite trick with the Roland SP machines is to set the sample to reverse, so you can edit the end at the start.
I’ve not done much long sample editing on the OT, so I’m not sure how workable these ideas are, but it’s where I’d start if I was trying it.