Great layout and choice of trains! I have a similar number of JR Kyushu trains but my layout is a fictional layout that pays homage to Eiji Mitooka who designed the interiors and paint schemes for many of the trains in Kyushu, which is why I named my Kato viaduct station as Mitooka Station. Is the 815 Series the unassembled kit from Ringo Seisakusho that you have to build and paint yourself because I have never seen a pre-built one and it is the only rapid express train that I am missing, apart from the 821 Series? Do you know if there are any plans by any of the manufacturers to produce an 821 Series set? If so, I hope it won't be GreenMax because they are terrible, but more likely to be them!