They don't like them in Fundies, but personally, I wouldn't want to use the RecWing for singles without the cords in.
But that's because the RecWing is barely tolerable for singles with the cord. Without it would be even more absurd... completely taco'd around the tank. Bad news.
If at all possible, use a singles wing for singles and a doubles wing for doubles. The RecWing is somewhat decent, though not great, for small doubles. But it's barely useable for singles. Best to get the right tool for the job... the RecWing, as an attempt at a compromise, does a passable job at both, but barely. And it's a PITA switching configurations.