Matt has the latest as of one week ago, every there is some new development, this week I have new input Fets arriving that have very low on resistance and more so very low noise, these were only made available 2 weeks ago as test samples and I only used the 2 samples on the bench testing. I could write a Thesis on low noise circuit design...the amount of discoveries are huge , even when we have all been told not to bother doing something as it will make no difference but it ends up making a huge difference. I already have the designs done on paper for for new coils and revamped detector electronics, some feedback from Dan who is up in Dunolly said that his modded 5000 gets at least 20% over a standard detector with no noise. Matts detects 0.2 grammers that sound off like half Oz, The 4500 wend down an extra 8 inches over a GPZ on 3 Oz at 22 inches, GPX was at 30 inches, these are 2 upgrades back.The new upgrades are going to rip the gold out of the ground.