i think a bcr and bcf are the best start point to get the ultimate control surface ( lc and c4 ) ( and dont work for berry !!). Unfortunately they lacks lcds and some button, it will be great if someone could develop an extension based on midibox to pimp those device to achieve a complete emulation. if someone is interested i will happy to supply hardware for testing ( bcr and bcf boards lcds buttons ..) regards manfredi