It is the 24th of December 2019 so my the time we have built up more circuit boards we will be referring to the new board for SD GP GPX detectors as the 2020 upgrade. Older detectors can be made just as good as, if not better than the newer detectors by swapping out older components and replacing with cutting edge technology as it is made available. I added a new board to an old 2100 detector and it can detect just as good as any of the newer detectors as long as certain criteria are met, timings can be made adjustable and the variable gain board placed just after the input stages makes a huge difference to ground noise suppression and small and large gold detection. When the weather cools off I will be making some proof of concept video's.