Those are great tips! I for one will find them useful
Looks like I need to get myself a pestle and mortar (don't have a food processor either lol). My only comment would be about the use of hot water from the tap - I think boiling/boiled water would be safer. I'm not sure if it's the same these days with combi boilers, but my Dad always said water from the hot tap isn't direct from the mains and can pick up bacteria in header tanks and so on. It's probably fine, but boiled water might be an idea