Just a small suggestion but you see ALOT of tiny work hammers for engineers but it sort of stinks you can't use them as a rogue unless you take a feat. It might be cool if the engineer perk (pure) let you have martial weapon prof. if you use it to wield a light hammer. Just an idea!
On a slight tangent, I've always wondered why there can't be the occasional club in loot that is useful to an engineer, giving the same sort of skill stats that these hammers often have. Simply term it as a wrench, or similar tool, and then there's tools available to rogues who are engineer concepts.
There's even a club head that looks mildly wrench-like IIRC.
I believe the alternate models for maces are the best for portraying some manner of hammer/wrench, and they're usable by rogues.