Concerning Eberron, I'd swear I posted that somewhere but I can't find it anymore. Maybe I just dreamt. Anyway, I attempted to convert the Artificer as a base class, because the magic item specialist "slot" was not used in FC yet.
. A couple of coments.
Core ability is vastly
overpowered when used to pay rep for magic items. I would remove Legend from the equation, as legend is already giving you Rep each adventure. Even then it makes me cringe. Making each point of rep cost 25 silver might also help.
Because Genius Tinker is greatly inferior to a "flawless" ability (single skill, takes time, limited uses), with one decent upside (can be used on an error) I'd probably remove the restriction on number of uses.
Arcane Library relies on having feats which you might not have.
Arcane Experiement should probably give you a number of choices you can scribe, rather than unlimited
choices. Infinite = busted.
Museum of the strange should probably mirror the Courtier ability as others have described.
Be aware that Attune magic Item can be hideously
abused by creating magic items, and then giving them away for rep you can use for anything.
And god made... So, I can shapechange a bank into a pocketwatch, stick it in my pocket and walk away with it? Would give serious consideration to keeping the same size, and possibly additional safeguards on this.