plawolf
Lieutenant General
It is still possible there is an optional fuel tank to be suspended inside weapons bay on certain missions, holding possibly 10ish tons of fuel.
That's what I was thinking. Kind of an internal fuel tank module that could be installed to give the plan additional range for long range missions, but also removed to allow the retention of the bomb bay for shorter range missions.
Since this would be an internal fuel tank, structural strength requirements could be pretty low. That means they could use an expandable soft skinned design, allowing them to add it with minimal adjustments to the bomb bay, while also allowing them to maximise fuel capacity without making it a challenge to install/uninstall.