Quieting the VERY loud H-Works freehub?

[PhatPhred]

I've got a pair of Nextie carbon spoke wheels built with Rollingstar III 20 hole hubs that I think are H-Works hubs. The 45t ratchet is VERY loud. I've tried applying DT special grease which quiets the noise a little for a short while.  The ratchets themselves are hollow. Are DT ratchets compatible?  I'm thinking of trying a set of lower tooth count solid ratchets to see if they make less noise. 
Hub exploded drawing: https://www.nextie.com/docs/Rollingstar-III-20Holes.pdf