I have finished the arm armor XDD the spike is very spiky (logical XDDD) I didn´t make the pattern on the spike because I hadn´t the material any more. In addition in original there are four layers and I only made 3 XD
I bought mine on ebay, but I haven` t used goose feathers because they were very expensive and too small, so I have decided to buy ostrich feathers. they are looking a bit different but I liked them more . But maybe you will find the perfect goose feathers in US ebay, if you haven`t searched already.