Here's a printable plastic stand to hold your RF current probe in a fixed position (why don't the probes come with something like this?): https://www.printables.com/model/307119-cable-support-for-rf-current-probe
3d printing LEGO-style objects makes for a weird aesthetic. Here's a script for generating icebergs, designed to compliment a LEGO titanic set: https://www.printables.com/model/339137-iceberg-brick