I just recently got my hands on an MC-300 and the problem is I don't really have much knowledge of the software and capabilities, if someone has a manual and some knowhow please respond, first can I use all the MC-500 OS/Patches/File Conversion softwares things? and if not, is there a way that I can use standard midi files from my pc to my mc300, can I use a disk from my computer via so twiddling and does the mc-300 record sys-ex messages? if anyone can help me out, they will be saviour thanx bunches!