I spent some time today trying to get a good baseline for calibrating the spreader on the Permagreen Magnum. What seems to be happening is that using High gear, it is about 5 notches higher than all of my previous Lesco spreader settings. In other words, if I typically spread 18-24-12 at 15, it appeared to be 19-20 on the Permagreen. My guess is that Low gear would be close to the old push spreader setttings. You'd think with as many Permagreen owners here, we might come up with our own list of spreader settings. I would offer to host this data on my website if anyone is interested.