How to get best flavour from these beans please?

[blacknstrong]

Hello all,
I brought back from Vietnam some weasel and kopi luwak beans.
I have tried the weasel so far, using different methods of brewing but I'm not getting the flavour I experienced from this bean when I first brought some back on a previous trip. The chocolatey bean smell is certainly there, as it was before. Maybe my palate has changed...?!
My typical coffee making methods are: Italian mocha, single cup drip, Aeropress, and French press. Using freshly boiled or just off- the boil filtered water.
I grind with a fairly basic Japanese mini Porlex.
I usually buy pre-ground but since I bought half kilo of the weasel I thought I'd grind as needed.

Can I invite some input on how to get that best flavour out of these beans?
Thanks for any input.

 

[Buskers Brew Coffee]

how old are the beans? Did you get them from the same place you got them before? I recently came back from Vietnam and brought some of those beans home with me and just could not get a good brew on the beans I got. It could be that the beans you brought home were not/are not as fresh.

Also, beans and crops change all the time and will change yearly, like grapes on a wine vineyard.

 

[blacknstrong]

I didn't buy from same seller. They smell as I remember with the first batch, nutty, chocolately, but it's all lost in the final result. Very disappointed. It occurred to me that I used to use bottled water when I brewed with the previous beans, then I bought a filter jug which I have been using for three years. The water in my taps is very calcified. So, just last week I tried brewing with bottled water but the results aren't any better. I conclude the freshness and/or quality of the beans is lacking.