So, I am in the market for this combiner from RiD, but which one should I get? The three I know of are the Hasbro Rail Racer, the Japanese JRX, and the Korean JRX. I am pretty sure there is no difference between the korean and japanese ones. So... which one would you guys recommend? I missed out when RiD was in stores, and I only have Prime and Magnus, and Ruination from that toyline. I do have the green Devastator version of the Build Team, so I guess that counts. But which of the train sets should I seek out? Thanks!