I'm a newbie weaver. I bought a Brio at a secondhand store, but it's missing the heddle. I've seen pictures on the internet, looks like there's 2options for heddles on these, a red plastic one, or a contraption with strings. Does anyone have close-up pictures or instructions that will help me figure out the heddle? Will instructions on weaving on a rigid heddle loom get me going on this loom? Thanks!