Non-professional pianist. I edit some works for 2 piano's or 4-mains in Musescore, so my co-pianist can play in/from klavarskribo. Klavarskribo versions are made with KlavarScript software. Straight from the XML files made by Musescore. I myself can't read Klavarskribo.
Rachmaninoff Symphonic Dances op 45 uploads: I have xml / midi files, musescore 2.0.3. Email me if you need them.