I inherited an SEM from my dad, and ended up linking up with some of the original engineers from Cambridge Instruments (who pioneered Scanning Electron Microscope design) to get it working.
They helped me a great deal and I tried to capture the whole thing - with the help of a friend we put together a video of the work to get the SEM back up and running - for the first time in more than 10 years.
The talk would be centred around the video - but also a chance for a Q&A, some description of how I ended up with an SEM, and/or presentation on SEM technology and/or refurbishing the device.