Increase the length of the MMT to act like a stuffer tube, or something. The Silver Comet suffered from "weak ejections" kind of like how the Big Daddy suffers from ejection failures. It's the shape of the bottom of the nose cone that allows the pressure to vent before the nose cone has been fully ejected from the airframe.

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-Wolfram v. Kiparski
NAR 28643 - TRA 15520
MTMA Section #606 President