I hunt for relics of the Civil War almost exclusively, and I have found the CTX to be an excellent relic machine. In my opinion, it will find lead, brass, and other items (ration tins, etx) just as well as the Deus. I also have luck with artillery fragments and cannister.
I set mine up in combine, with everything above Fe 32 discriminated out. I have two main patterns based upon the ground that I am hunting. In high iron, I have Fast On, Deep On, High Trash, Pinpoint Sizing, and Long response. In fields and lower trash, I have Fast Off, Deep On, Low Trash, Pinpoint Sizing, and Long response.
I have a backup that I use in very rough ground where I turn Seawater mode on. I only use this mode in high mineralization, usually livestock fields that have become saline with years of animal pee.
With Fe 32 and above discriminated out, you won't pick up small iron or nails. But big iron will still ring, stuff like cannister balls, artillery frags, hammers, horseshoes, etc.