Ooh interesting. I am now using a set of Crud Roadguards:
http://www.crudproducts.com/
Have been using the Crud Catchers on my mtb for years. I find them so, so much better than the Race Blades, particularly on the front as they stop wheel spray into my face and onto my feet. They won't be as sturdy as your solution long term but it's easy to get spares.
I'll be using my road bike to commute into the wet winter much more this year before switching to the tank bike when they start salting the roads for fun as they seem to like to do here. They'll probably only come off the road bike for about three months each year, if that due to the lovely British climate.