AnotherDilbert
SOC-14 1K
Add a 2.8Td drop tank to the 1.2Td drop tank, so it can do J2+J2. Then add a 3.2Td drop tank (or get fuel supplied from a tender or other ship) for a third J2 (all-up it's 16.25Td with the third drop tank).
Drop the third (3.2Td) tank during the first jump. High odds of a misjump with 3Td external tanks (as opposed to near-certainty with 6.25Td hanging out there).
Why would a bit of external load induce misjump?
Does the Subbie misjump often because of the external life boat?