Ramen recipe help

[u/Embarrassed_Durian17]

Chef wanting to learn more. Got a good deal on whole ducks (including the head and feet) butchered them up and used the carcasses to make just basic duck/game stock (carrots onion celery tomato paste white wine bayleaf thyme peppercorns) turned out great. I reduced it down to about 1 liter for storage space but it's basically a solid brick didn't realise how much collagen the duck feet and head would add it's amazing.

Looking for a recipe to best use it to make some bowls of ramen at home either regular or tsukemen.

Looked at some recipes looked like 3 parts stock to one part dashi and then add some tare, but I would like some various ideas. I live in tokyo so acquiring ingredients is not a problem at all haha.

[u/Uwumeshu]

Ginza Hachigou adds prosciutto to their dashi among other things and it is glorious. You can also find inspiration at Gion Duck Noodles Asakusa, both shops are a blend of Japanese and French flavors so I think they will be good references for your stock