This is not a dual deploy rocket, or are you trying to make it that way?
This seems like the coupler should be glued in to attach the booster tube to the payload tube and the eye bolt and/or bulkhead should go on the base of the nose cone.
I don't have the instructions on this, but I'm not surprised you might be short of space if they tell you to put the bulkhead on the coupler. I've found that lots of kits tend to be short of space for recovery. I think the manufactures want to save a few pennies on BTs.
This seems like the coupler should be glued in to attach the booster tube to the payload tube and the eye bolt and/or bulkhead should go on the base of the nose cone.
I don't have the instructions on this, but I'm not surprised you might be short of space if they tell you to put the bulkhead on the coupler. I've found that lots of kits tend to be short of space for recovery. I think the manufactures want to save a few pennies on BTs.