What about the Scootababy? That's a great hip carrier. I know you've already been given some advice about it so I won't repeat.

There are many different shoulder styles for ring slings and what suits one person may not suit another. Gathered shoulders (like Bear Hug Baby, Sakura Bloom) are commonly spread over the upper arm and are generally much wider than most other shoulder styles. If you are narrow shouldered then a different shoulder style (eg: pleated) might suit you better. What sort of ring sling do you have?