Is your feature request related to a problem? Please describe.
YES! I want IronChest's chests to exists on their cargo variant! Crystal/Diamond/Gold/Iron/(and IC2 related)Silver/Copper Cargo Carts!

Describe the solution you'd like
Implement those cargo carts, please!

Describe alternatives you've considered
I'd love to make it myself, but ForgeAPI is way over me, and it's hard to understand RailcraftAPI too. I can help, finding and maybe fixing any bugs - newly implemented features (and comits) can make someone understand how this mod works.

Additional context
I love this mod for the features it adds, and I love IronChest for the storage upgrade!

PS: if this is not the way I shoud request a feature, sorry! :)

RailCraft does not add iron chest carts. Those come from an addon you have installed.

Umm apparently there is an addon for this... I never thinked for addons, thanks!