Two YES2 student engineers painstakingly manufacturing the special shoulder screw for the YES2 satellite by hand. This tiny element of the system is an integral part of the baberpole (friction brake) component of the satellite. The specifications of the shoulder screw are some of the most demanding of any component on the satellite, with manufacture completed at the micron level of magnification. The shoulder screw fits into the baberpole, fixing the wormwheel in place, while simultaneously allowing space for rotation of the wormwheel.