I am trying to devise a double trigger mechanism to trigger two magstrikes separately but from one handle. I am planning to take the firing mechanism of 2 magstrikes and mount them in a side by side configuration and hook them both into a single handle with two triggers that actuate each separately from each other.
This is the trigger mechanism I am working with.

One of my ideas was to stack the two valves horizontal onto each other and then have a trigger over each of the orange trigger pieces.
My problem is how to craft a custom handle and trigger parts to accomplish this? I look at the walkthrough of replicating parts with resin and thought maybe I could extrapolate from that and create custom housings for the valves and triggers, but I'm not sure how solid it would be.
If you can decipher my rough sketches, maybe it'll give you a better idea of what I'm after.

A more ambitious idea would be to feed both into a single trigger thru a solenoid valve that would electronically switch between feeds based on a sensor detecting when the magazine was spent, but I don't have the money to be doing something that intricate at the moment.
Any suggestions folks? Thanks