Microscope Clip 3D Print Model

Summary
This is original PNNL microscope clip (see pnnl.gov and midcolumbiastem.org) with customizable hole diameter. This way you are not limited to glass beads of specific diameter but you can also use your own lens. For example lenses from laser pointers as described in instructables.com.
How I Designed This
STL to OpenSCAD conversion
Thingiverse customizer will not let you import STL files to OpenSCAD script due to arbitrary limitations (see customizer.makerbot.com/docs#limitations). So I wrote simple script that automates the conversion – off2polyhedron.sh. Works as follows:
get your STL file and open it in OpenSCAD
select File > Export > Export to OFF…
run my script on the OFF file
e.g. ./off2polyhedron.sh model.off > model.scad

the SCAD file is clean OpenSCAD code and can be used as is or copy-pasted to another SCAD file
Download the conversion script here – off2polyhedron.sh.