I've been researching Kinugawa for a couple of years now, verifying their reliability as a MFG. Pulled the trigger on a T518Z for my stock ej205, just looking for a "mild" upgrade from stage 2. Will post unboxing, impressions, etc.
Self tuned the Stg2 setup, looking forward to getting the tune laid down for the new turbo as well.
I may eat crow, but I feel like they're a good product and not just another "ebay knockoff". I'm glad these turbos are getting more exposure here, it seems they're known to be very reliable in other circles, just not on NASIOC (yet). Plus, they offer some configurations that aren't advertised anymore by the other MFGs.