I have both of my splits, but I’m not quite to a scorp yet. I stretched everyday for a couple months, and got them. Before you stretch, make sure to warm your muscles up, stretching with cold muscles won’t help you at all. I always run a couple laps before I stretch.
I’ve answered a couple asks in the past about the splits and included stretching videos. You can find them if you scroll down the replies section of my blog.