Terrifying. I’m an amateur still so what I tend to do is trace the pattern pieces onto baking paper and cut that out rather than cut the original.

It’s a pain in the butt to tape pieces together and might not be feasible for quite large ones but one thing I thought of was - before removing the translucent copied pattern from the fabric you cut, you could roughly trace the design and stripes from that fabric piece and then line it up with the design on the next bit of fabric to make sure they match up?

It might not work if pieces have to be flipped or cut on the fold but that’s a way I might try to cheat through the intimidating task