I gave a talk to the Radio Society of Great Britain Convention on Oct 9th 2021 via Youtube. The recorded section is on my Youtube page at https://youtu.be/7GINqOnwxCc

It would be hugely helpful if you have a Youtube login if you could subscribe to my channel https://youtube.com/MachiningandMicrowaves

The RSGB recording includes the interview section by Jim Lee. https://www.youtube.com/watch?v=9_78oR9SZRc

The series of videos about making a rotary mast clamp for VHF/UHF/Microwave portable contest operating is also on my Youtube channel. Latest episode is the final assembly https://www.youtube.com/watch?v=sNpHqtuJ-Ik