Sorry what do you mean by wornandwound being thin yet stiff?
They’re super thin, but the nylon feels very tightly woven I guess? They have lots of rigidity and just don’t like to bend a ton. Honestly those attributes are positives in most cases, and i love the straps, but they just don’t work so well with the speedy... I've never heard about the curved spring bar trick. Could be a helpful improvement.
I have always been a vintage rolex fan and recently got bitten by the vintage omega bug. The omegas without the crown guards are really beautiful imho.