I'm glad my efforts are different to Devon fighter's. To start with, from a roe I would usually only use either neck or foreleg. When I make the pastry I use (for example) 2 lbs flour, 1 lbs baking margarine, salt to season and a teaspoon baking soda. Lightly mix the ingredients until you have a nice even dry mix. No lumps. Gradually add water or a mix of water and milk until you get a nice pastry. (Trial and error I'm afraid). Put on a flat plate, cover in cling film and into the fridge. 1/2 to 1 hour should be good. Enough for about 8/10 pies, so scale down to your requirements.
(Approx).