Coffee Appreciation

You'll find you need to adjust the grind when you move to a single basket. I tend to just stick with the double when making a large mug drinks

This.

Moog - are you using scales for your dosing? As bombcup [doffs hat] has mentioned elsewhere, dose also has a huge impact on flavour of the final shot. I find that if it's acidic, then increase by a gram a see what happens.