I needed a little more distance on the multimeter probes than what was already available. I saw many different options but I liked the snap in capabilities from [https://makerworld.com/en/models/627467?from=search#profileId-552062](https://makerworld.com/en/models/627467?from=search#profileId-552062) so I cut them off and connected them to [https://makerworld.com/en/models/910465#profileId-871231](https://makerworld.com/en/models/910465#profileId-871231) with an additional smaller version to hold the probes in place. The adjustable distance really came in handy for me and may help you out as well.

I don't believe the type of filament would matter much since it would mainly be inside. I personally printed mine in PETG just in case I forget it outside.