My brother wanted to mark the stones with a handheld GPS and just lift the header of the combine. Given that this was 1999 we just opted to leave the device in the loader and it just about marked every tramline it went down. Technology is starting to catch up with his futuristic ideas .You could get the baler to send the gps coordinates of the bales to the trailer!
When Pouron Ivomec came out I remember him talking to a rep at a beef event in Grange and suggesting a pouron that would castrate weanlings. Rubber gloves optional.