Next I had to add 70 ounces (~4.5 pounds!) of lead to the inner tip of cone to ensure stability with the heaviest motor. I weighed out the lead shot into two 35 oz batches, mixed up two cups of epoxy ~1/3 full each, combined the two batches, and poured them into the inverted nose cone:
Finally I drilled and mounted a U-bolt into the final bulkhead and sanded it to fit inside the uneven shoulder of the nose cone:
Again the fixing of this bulkhead is on hold until the expanding foam arrives. I plan to fill the nose cone with foam to improve its rigidity and resilience. It seems fragile and likely to crack/break upon ground impact without inner foam.
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