Is there any way you can leave the old Uranium fuel cell in the recipe list for the purposes of maintaining the compatibility with other mods that use the Uranium fuel cell?

I... could, by making them just not work as nuclear fuel, tho this would mean that enabling cores breaks existing fuel cells. But it would be good for compatibility with other mods, as you say.

It'll be a breaking change, but I think it would be worth it. I'll start on that.

So awesome! Thank you. As an example the tiered Portable Fission Reactors mk 2 in Vanilla Personal Equipment need UFC to be upgraded.

Recipe restored in 1.6.2 as a non-breaking change. They're still burnable. The actual 2.0 with breaking changes will have more changes, so I wanted to get this in sooner.

Thank you so much!!