Yeah everybody talks about the Noob V3 Sub case, legendary stuff, but that case won't take a Yuki3135 so if your plan is to build a tell-proof franken rep be prepared to spend lots of money ($2500-$3000 - gen is $4000) for heavy mods like soldering-retapping etc. Or else forget about the engraved rehaut, and buy a TC Sub V6 with a gen insert. Not every gen sub has engraved rehaut so don't worry about it. I used to worry about it too much like you did but not anymore.
Why? no super franken rep can have inverted time/date setting like an ETA does, it needs either a yuki3135 or a R3135 or its an instant tell to anybody handling the crown, no matter how good, no matter if every other part is genuine. If you're gonna expend $2500 - $3000 on a super franken rep you better do it for love / fun or else save $1000 more and buy the genuine, or third option, enjoy your rep for what it is ! =D Buy a good rep like a TC Sub V6 or a BK Noob V5 (116610) and enjoy them, save money and explore other nice reps like Pams, Tag Heuers or cartier Santos.