My advice is to look at some XML files of other midi controllers that Serato or the company that created the controller has supplied mappings for… For example: Native Instruments Kontrol X1 or Vestax VCI-380. There is a lot to learn by looking at those XML Files. Also, do a search on the net… Many folks out there have come up with a ton of the hidden syntax that you would normally not see in the standard XML files. A site to look at is www.poweronplay.com The creator of the site, JJ, is a wiz at midi mapping.