This isn't a 5-layer cake we're talking about here. A structure that can survive being caught between a payload on one end and a rocket motor on the other is g

This isn't a 5-layer cake we're talking about here. A structure that can survive being caught between a payload on one end and a rocket motor on the other is going already have the strength you need in most of the places you need it in order to hang from a parachute. The hard part is going to be attachment point real-estate since the most logical choice is going to have it fighting for space with rocket motor bits.