Arm chair guy here, have you thought about designing MEMS-like solenoids directly into a PCB? https://www.researchgate.net/figure/Schematic-Structure-of-the-ME

Arm chair guy here, have you thought about designing MEMS-like solenoids directly into a PCB? https://www.researchgate.net/figure/Schematic-Structure-of-the-MEMS-EM-Actuator_fig1_310615934 https://www.researchgate.net/figure/Schematic-Structure-of-t...