Been doing a little research on this subject and heres what I found. Shrecks Pistol is a quest item only. It is not a working schematic even if you pickpocket off Mr. Black. The Clockwork Physician, Illuminated Decoy and Automaton Gunner are not in the game. The only way to get working schematics for these items is to use the save game hack. Even if you do use the hack they don't all work. Shreck's Pistol only does 1-6dmg, 1-3FT, uses 1 bullet and has speed of 15. You can do more damage with a Fine Revolver and use less ammo in the process. The Clockwork Physician and Illuminated Decoy are non-working. The Automaton Gunner was never finished apparently. All your doing is combining an Automaton with a Elephant Gun to get the exact same Automaton you started with.
Is ANY decoy working. I tried the clockwork decoy but it just lured my followers and my enemies ignored it.
Well I notice the same thing myself. I was on the The Elder Scroll Forum for than while user name Barenziahlover. The third Roleplaying from this company in the Elder Scroll Series will be release soon.