It occurs to me that where it already weighs millions of tons and has commensurate engine power, being a combination expedition base camp and icecube tug for the Martian oort body retreival project may serve to fill the 'curl's time in a more interesting way than "business as usual for 5yrs to save up enough for Castle Borealis." Being in a vague semi-leadership position for the Mars-based Gearheads, it behooves them to take an interest in the terraforming project, adding the twin engine for that at first.
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"Anko, what you do in your free time is your own choice. Use it wisely. And if you do not use it wisely, make sure you thoroughly enjoy whatever unwise thing you are doing." - HymnOfRagnorok as Orochimaru at SpaceBattles
woot Med. Eng., verb, 1st & 3rd pers. prsnt. sg. know, knows
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"Anko, what you do in your free time is your own choice. Use it wisely. And if you do not use it wisely, make sure you thoroughly enjoy whatever unwise thing you are doing." - HymnOfRagnorok as Orochimaru at SpaceBattles
woot Med. Eng., verb, 1st & 3rd pers. prsnt. sg. know, knows