[Andy Pugh] found himself in need of a large linear slide, so he resorted to making his own with steel square tubing and a bit of PTFE (Teflon). The PTFE slider/spacers [Andy] needed a compact ...

Its linear outline format makes it easy to organize your subject matter. But for the audience, that could turn into a mind-numbing drill of slide-after-slide-after-slide. Its charting and animation ...