Okay, I've ordered a set of the Crud fenders.

I have the PDW Full Metal Fenders on my commute bike, they are great, but too heavy for my current need.

I've tried RaceBlades before. They were okay.

A set of the Crud fenders is on another roadbike I have. They were very fiddly to install, but the seatstay placement on that bike is unusual and the fenders just didn't fit right. Also, a fender tip fell off. But I'm hoping to have a better result with the Vitus, which is of more conventional design. And I'll locktite the screw for the fender tip.