Oh, well in that case since it's really for this scene might as well use them up and succeed.
Yep, momentum at work!
So outcomes:
Whoever you have scrambling around inside and under the tank replacing gaskets (Athletics) does a masterful job, even going so far as to clean up most of the gunk that's making the bay have a very inhalanty aroma. They get everything fitted to Gertrude's specs in record time. The team ripping out the autoloader (Engineering) manages to follow the manual, more or less, and gets it out without any damage to the subsystem or the tank, so you now have an intact first-gen Theimer autloader (still inoperable though).
The radiator is touch and go. At first is looks like the whole thing will have to be torn out and replaced, which, owing to the high quality ragnite alloys used in the fins would be an absolute nightmare in terms of requisitions. Luckily, with some good team spirit and back breaking labor (Physique, all the invokes) you and your crew manage to get all the bent ones straightened out. The damn thing looks practically brand new!
There's your general outline, I sort of like the idea of narrating based on the ebb and flow of the dice and invocations, but I leave that up to you. Recap: Leaks plugged, workspace a little cleaner, removed autoloader, and radiator is back at 100%. The next bits (rewrite, armor, gun) are probably going to have to be handled in the timeskip that'll come between the end of this introduction period and the first operation. As is, you're probably ahead of everyone else in the timeline since the challenges represent larger chunks of time with just a few rolls. Fair warning.