2016 - Colin Foulke – Hydroforming Method dedicated to public

Article: http://www.hangdrumsandhandpans.com/2016/07/making-handpan-shells-building.html
Video:
Podcast from 2019 about Hydroforming: https://www.sylvainpasliermusic.com/post/the-hydro-map-mini-series-with-colin-foulke

Note: Hydroforming was also used for Steelpan research:
“The CARIRI Project” (1972) https://www.panonthenet.com/history/panhist.htm