That’s a lot of work for nothing; you don’t need the fusing. Take a coffee can and fill it with bottle rockets. Light one and drop it in pointed down; its flame will light others. The heat from the fuses and motors will start a chain reaction and they will all go off.
On a larger scale you can do the same thing with sky rockets. I worked in the fireworks industry for a decade. One year we had several cases of large 8 oz skyrockets that were water damaged. We couldn’t sell them, but I figured they would probably still work. I filled a large box with hundreds of these rockets and lit the whole lot of them with just one rocket pointed down.
