Hi all. So ive done a few 5gallon (uk) batches ok beer now and have now managed to get a proper ale cask. I have a hlt, boiler and mash tun capable of 5gallons. Can any of you recomebd a way of brewing 9 gallons with the same equipment? Ie, maybe more concentrated wort and just top up with preboiled water to get 9gallons. How do i mash nearly 10kg of grain in a 24 ltr tun?