Brewed my second all grain batch yesterday. Was using my new kettle for the first time. Did a fat tire clone. This time I preheat the mash tun, kept the 155F for the whole time. Was able to hit my boil volume, post chilled volume was right at 5 gallons and the most important for me I hit OG right on the spot. Was really proud of myself (didn't took much isn't it!) Amazing how the right equipment make the experience more enjoyable....