To record samples with the PO-33 K.O. you need to push the record button and the slot button together, which is pretty inconvenient. Especially when using an external microphone it hepls a lot to have one hand free. So the low-tech solution is a little clip that keeps the record button pressed down, so you only have to selevt the slot to record to and done.

This is ment to be used with the PO case from crashdebug. 
(https://www.thingiverse.com/thing:1375818)

When not recording just clip it anywhere on the PO Case. Comes with the text REC embossed or engraved. Best printed with a signal color so you dont have it on the record button without noticing.