>>10742239found a 3d print to attach launchers together and it works great, just had to file down some edges to make it fit together. the space between is perfect to fit three fingers and grip both cords, but i think i'm going to design a grip that connects them so launches are more consistent. i had also printed off some bits i had found online and they slot in perfect, they would just require a bit of extra work to smooth the surface where supports are
https://www.thingiverse.com/thing:6281562