When a friend of mine commissioned me to make her a River Tam vest for her Dragon*Con cosplay, I was really excited because 1) I love the show “Firefly,” and 2) I’d never crocheted a costume piece before! I was also nervous for that same reason. Thankfully, other yarn-crafting cosplayers have paved the way for me, and I found a wonderful, widely used pattern originating at the Dragon Crafter blog, which includes links to some other blogs that have fleshed out the finishing phase. I ended up finishing it using Rogue Bibliophile’s rundown (the site is weird and doesn’t link directly. If you have a problem, just hunt for “River…