Hey everyone, I am looking for a 3D printable file to replace the black locking ring/collar on the YSI calibration and storage cup. It seems to slip off way too easily during field tracking, and buying replacements is getting expensive. Has anyone modeled this yet? If you have an STL file or a parametric design you're willing to share, please let me know. Alternatively, if you've engineered a clever way to tether or lock the collar so it physically can't get lost, I’d love to hear how you did it!   submitted by   /u/Low_List3241   to   r/labrats [link]   [comments]