Hi, I play on the 2.1 experimental branch and I have encountered a problem with the graphics on the sifter! To be precise, when the sifter is configured to a recipe that has no fluid outputs (Lithium brine sifting, Pure sand venting, Steam venting and Cactus plastic washing), the pipe covers on that side are all missing, regardless of orientation and mirroring. Aside from that, the top pipe covers in the north/south orientations (when rendered) seem to be misaligned a bit, creating a sort of double beveled pipe end, unlike those of the chemical plant, press etc.
