Dynamic Tank has the same recipe that Railcraft steel Gear, when have this two mods, you cant produce dynamic tank and rotatory condensentrator.

After so long I now think Railcraft can restore its recipe because the recipe for dynamic tank itself changed.

They were added at the same time as boilers, I'm pretty sure that was before you added tanks.

You tanks are really Steel Ingots surrounding a BC Stone Gear?

Dynamic Tanks have existed longer than RC's steel gears - use a recipe editor to remove/add recipes for them :)

Ah...its the alt recipe that is conflicting, I can fix that.

Thanks so much for the quick response, @CovertJaguar! :)