Hi, Is it permissible to use a lettuce dryer on Shabbat? It’s completely mechanical - no electricity is needed. I am asking because it has a strainer inside. It has a mechanism for turning the strainer very fast so that the lettuce becomes dry. Thank you.

HaRav Ya'akov Ariel allows it for everyone, as does Rav Asher Weiss so you definitely have upon whom to rely to use it on Shabbat.