The shims that came with my Restek vacuum manifold have no lip so my collection plates slide all over the place and make a mess. Ruins everything.

Open this up and adjust the height parameter to whatever's needed. You can adjust the lip height if the collection plate doesn't grip enough.

Drafted to conform to ANSI/SLAS footprint dimensions here: https://www.slas.org/SLAS/assets/File/public/standards/ANSI_SLAS_1-2004_FootprintDimensions.pdf

The lip offset isn't specified so that may also need adjusting. You may also have to adjust your slicer settings for tolerances.