That was my thinking. The runabout is a very rugged and robust little ship I didn't think it would be a new thing so I slipped in an older design (I see the internal arrangement being cockpit with the crew cabin behind, with the modules at the back, whilst the nacelles were at the top rather than the bottom, like on the Danube-Class).
I was going to have a line in about how Rhyth would've used one of the Juno
's shuttles, but with only a fortnight to go until launch, she needed something faster and so got a loan of the Kilimanjaro
from the shipyard. Not sure I'll include one in the normal shuttle complement though.