I tried the long steep method today. Wow, what a difference. I've had two Americanos today and they have been excellent. I'm now happy that my Aeropress will produce better coffee than the branch of Costa at work.
I'll be experimenting with metal filters now, I have one already but might try some different ones to see what effect they have.
An aeropress concentrate diluted with water isnt technically an americano, its still a filter coffee . Its a bypass brew.
Glad you're enjoying the virtues of long steeps. A long steep full immersion (all the coffee and all the final water) brew is even better.