Rowing Slings

Did you grab the wrong sling or tend to confuse someone else's slings for your own? Currently under development, I'm looking to design/build/test for manufacture a custom fabric replacement for a rowing sling. Sourcing slings from different manufacturers and establishing a set of common sizes for large and small slings. I have a template in mind, materials sourced, manufacturing outset tracked, it's just down to finishing a few examples for long term testing. And as a bonus: I might as well make them look awesome at the same time being functional... that's the key selling point.