Settings are pretty basic for tpu hot end for me was 220 bed 60 .2 extrusion I didn't know the shore rating on the TPU I put down stick glue to bed. I would suggest putting the two hole end in slotted end first leaving you a loop for your cord the key holder was for a 3/8 chuck key with a ¼ inch handle. putting the two hole end in the slot can be a bear fold the two hole end and wrestle it through the slotted end. I would recommend an 80 no more than a 90 shore TPU.