Print your Biropette rack now! http://www.thingiverse.com/thing:257254 ///////////////////////////////////////////////////////////////////////////////////////////////////////// CHECK OUT OUR SCIENCE IN AFRICA NGO: TReND in Africa gUG: http://trendinafrica.org/ A registered charity run by volunteer scientists on 4 continents Help us design good, affordable lab equipment for African scientists! http://trendinafrica.org/activities/open-source/open-source-main/ Join us! Sponsor us! Spread the word. Thank you! Also, check out our dedicated lab.equipment tinkering page: http://open-labware.net///////////////////////////////////////////////////////////////////////////////////////////////////////// For details, see downloadable pdf. Read that before printing! You may have to use the customizer, e.g. depending on your printer accuracy, what range you want, or which type of tip you plan to use! *inspired by the straw pipette: Thing:64977 by kwalus. Videos: http://www.youtube.com/watch?v=xSZF4PS-I2Q http://www.youtube.com/watch?v=iw-suQJaudM UPDATE 2014 02 25 uploaded v16 scad and stl - this has a relatively tighter fit between parts A and B, for the same tolerance. v16 scad is now the one accessed by customizer. see downloadable pdf! In short, find some sort of tube that will fit a pipette tip (metal tube, PVC, anything) - then measure its diameter and put that into the customizer - alongside with all kinds of other options. Then you will need a bit of glue, a lab glove or similar, some tape, and 2 biro fillings including the spring. And one screw.