I am building a multi (3) lens camera from scratch using Polaroid MP4 shutters and lenses. The shutters (copal) are self cocking and can be fired with a cable release.

I have a plan for doing this that involves mounting the cable releases for ewach shutter side by side and then using a separate cable release to fire the others.

However, thought I'd ask for other ideas in case I'm missing something obvious. BTW I'm short one MP4 shutter if someone has one FS.