Kia ora!
Why use cranks or handwheels? Use electricity - as libraries and some
collections management facilities do!
For information on the experience of the Canadian Museum of Civilization with
electronically controlled collections shelving, I suggest you contact:
jim.donnelly(at)cmcc.muse.digital.ca
(replace the "(at)" with the usual character, which our email doesn't like to
see in text)
Regards to all at MONZ,
Harry Needham
Canadian War Museum