i have heard that ricky gauld is now supposed to be up to speed with mapping...but that is just hear say....he is located about 5 miles east of huntly..,you can get a field harness or try boomslang fabrication plug it in to google they make all sorts of harnesses for piggy back etc,i got my harness for my emu made by them and it is a very nice bit of kit,cost you in the region of £120-150...but well worth it as you won't have to chop yer loom up and also itjust makes life so much easier