I appreciate these mods for adding a little extra fun to the game. Thankyou for the work on them.
On the fuels. Its pretty annoying that I need to clear the empty barrels manually otherwise the tanks won't refuel. I think allowing the energy cell would be appropriate fuel to add as an option. I would appreciate a stack size config option for them (and the empty containers) too.
The 30 inventory is fine, but also really restrictive with the smaller ammo/fuel stacks. Up to you to keep or change; but makes long expeditions need multiple returns to base.
I am impressed with the balance. The main gun for the 40k tanks level well and are each a fair feeling increase on the main gun of the base tank; being much worse at penetration but a little higher in splash.
The configurable equipment grids mod doesn't let me configure the equipment size of these vehicles. I am not sure if that is a toggle that has to be done in his mod or yours. They seem to be among your most popular though.