Over Engineered Vertical Sample holder (PIP)

Print facing down. This is print in place and designed for a 0.2mm layer height. 0.1mm should also work. The holder contains leaf springs in each slot that adjust themselves to different vial sizes ranging from 15.9 to 15.1mm (the smallest and biggest sample I owned), for this reason, I recommend PETG although it might make the print more difficult. I printed mine out of PLA and it's still working fine, but PLA can in theory creep and lose some of it's grip with vials that are too big. H