I'm amazed you got a decent launch out of a cluster like that, it would be hard to get all of them to light before the first starts producing thrust. I think t

I'm amazed you got a decent launch out of a cluster like that, it would be hard to get all of them to light before the first starts producing thrust. I think the parachute would have worked better with a B but I'm not seeing anything in their catalog that looks like a good fit. As for a heavy design--put high thrust engines in the sides and low thrust/longer burn engines in the core. The pieces are *not* attached, the core is basically riding on pins on the sides, when the sides burn out the core simply lifts off the pins. Arrange the fins on the sides so they have a desire to fly a bit off straight--once they separate they'll start to spin outward from the core and hopefully not get fried. Put some engines with a very short delay that blow out streamers and a longer delay (once the streamers have a chance to kill the spin) for chutes. I'm not sure how to build compartments for them, though, the standard deployment won't work. You'll need a very powerful ignition system to get everything to light close enough together.