Basis of test:
Swissgold KF300 filter
16.00g of Londinium's JBM peabury 2010 crop ground to espresso fineness on a Mini Mazzer electronic
285ml resultant solution (input almost 295ml/295g of water, the difference being retained by the coffee grinds)
Freshly boiled kettle works fine with the Swissgold as it has dropped to the desired 92C by the time it makes it's way through the base of the reservoir and makes contact with the coffee grinds inside the body of the Swissgold KF300 filter