I have no direct experience with aftermarket 1680 cases, but I sort of agree with Ronin. I have found that Yuki's English communication skills are quite satisfactory, so I would just check to be sure you can return his case if it does not fit (my experience with other Yuki parts is that they will accept the part back without any problem as long as you demonstrate why it was defective or incorrect). In any case, unless you are 100% certain that crowns, tubes & crystals are gens, I would factor in the cost of gen replacements no matter which aftermarket seller you buy a case from (why would you expect to receive a gen crown/tube from a seller of aftermarket cases, crowns & tubes).