A couple weeks ago I installed a secondary filtration setup in my CRD. I used the WIX head and the WIX filter on the WWDiesel custom bracket. Everything is working great! All went as has been noted in past posts, but I will add or reiterate the following from my experience.
I used permatex non-hardening sealant on all of the threaded fittings, being careful to apply none on the first two male threads - especially on the fittings downstream of the secondary filter.
I installed a Facet 40109 under hood with a NAPA 3270 inline prefilter. I mounted the pump directly to the side of the battery using 3M dual lock (think heavy duty Velcro) and wired it to the proper spot on the relay.
I did use the hand pump to initially bleed the air from the system. After the initial manual bleed, I switched over to using the electric pump to bleed air from both the primary and secondary filter heads.
I really thought about using some aluminum stock I had to build a bracket for the head. I ended up using the WWDiesel custom bracket, and I'm glad I did. Nice clean install, and it put things right where they needed to be. No fuss.
Thanks to all previous posters for making this mod go so smoothly!