dude, I've got more than that in my car, its all forged but basically stock, and I haven't even driven it yet so i'd say you did fine.
My gut feeling is anybody willing to spend money to match the intake parts with mystic (which is mucho grande $$$$) probably did his best to make sure everything else was done right. that's a good sign for sure.
that was my logic as well. The interior is MINT. All the parts that I COULD see were there. I looked up some things that typically go wrong aesthetically and it hasn’t happened to this one yet (factory radio fading, cowl cracking). So my feeling was if they took the time to take care of all those parts, they probably did the rest correctly.