Coffee Appreciation

I usually tamp Espresso-ground coffee down hard into a 3-cup Moka pot, producing an almost Ristretto-short double shot. Can't see how I can get near that with the Aeropress.

I'd say that you're not "supposed" to with an Aeropress. Stick to your moka pot for that. The Aeropress is much better for making longer/filter styles drinks where you are trying to tease out different flavours rather than going for concentrated shots.