Here's something to bear in mind about the Planet Bike Cascadia fenders: They shorten the fender before adding the mudflaps. This defeats the purpose of a long mudflap.

I have SKS P-series fenders and PB Cascadias. The SKS fenders without mudflaps are exactly the same length as the Cascadias with mudflaps. The ideal would be an SKS fender with a Cascadia mudflap.

Last year I purchased the Euro-spec SKS P-series fenders, which come with a mudflap. The North American versions do not. The Euro-spec SKS fender is the same length as the North American one, but then they add the mudflap to it. It's much closer to the ideal.