Castle of Illusion for Sleeping Dogs ? <| sep |> Yeah , that ' s the impression I got , it ' s just not available for the R 510 or R 610 . The R 710 does have it but that ' s overkill for me . I figured there ' d be a small delay before the unleashed firmware hits , but the R 510 has been out since July . The R 710 just got it 2 months ago and it was released in Q 2 2015 . It just seems like a product they ' re not really interested in maintaining and I was hoping someone had some more knowledge than I do . The videos make it look great . <| sep |> There ' s a bunch of flat map stuff described in the Error Handling chapter of Rust Lang that ' s hopefully helping me grope my way towards idiomatic Rust . Error Handlinglang . orgbookerrorhandling . html