Since Ady is replacing the Tydirium with a cargo ship, how about one that is much bigger. Then it could hold a couple hundred rebel troopers. These could be the troops that defeat the imperial ground forces with just a little help from the ewoks.
It would be cool to see a shot of the rebel troops on route to endor strapped in like the drop ship scene from Aliens.
“We have stolen a small Imperial shuttle.”
Maybe the empire would consider a shuttle that can only carry 200 as small.
However, if the line needs changing to remove the word small, I am sure that could be done.