A couple of utilities created by forum members…
On indiegogo, does a LOT more than sample chaining:
Sampe chaining:
https://ticticelectro.com/2017/08/26/octachainer-v1-3/
Some tips here if you want to create chains in a DAW or on the OT itself:
https://www.elektronauts.com/t/sample-chains-vs-sample-change/10809