Serving High-Modulus Line (Dynex Dux)

[benz]

What's more important with Dux, I think, is having a proper spreader tip. Where the shroud touches the spreader should be a nice big surface, not a tiny sharp point pushing into your dux. For my synthetic shrouds, which aren't as touchy as Dux, I made a spreader tip out of UHMW plastic with a curved groove in it that gently supports the shroud along a 1 1/2" bearing surface, and makes the turn more gentle.
As for service, I'd say just use a piece of leather, and make sure the spreader is well seize to the shroud so they can't work against each other.
Ben