Well, I do hope everything is okay.
I always get the weak knee feeling right before starting and engine that I've cleaned the Intake and head ports. It is very nerve racking to me. I have a special tool that I had a welding shop make for me (sort of like a dental pic). I use it along with a shop vacuum cleaner with a modified suction tube and compressed air. I've got pretty good using a light and shop mirror ........... but, it still scares the hell out of me. For a fresh Intake Manifold, I always keep one soaking in water with Dawn Liquid. I change the mix two or three times and after about two weeks, the pressure washer finishes the job. So, I always have an extra clean Intake ready for use.
The above head come off my brother's 03 Jetta which come from a Guru Shop (to remain nameless). They later admitted the car was "rolled" through the auction when they purchased it. The disaster happened about 11k miles after he bought it at 75 mph on I-75 north of Chattanooga, Tennessee. I installed the engine out of his wrecked 01 Jetta (that was about 5 years ago). Ironically, I am buying the 03 from him in about two weeks. My 2000 Jetta, with 370k miles on it, is going to my son.
Yeah, your Diesel Purge set-up looks fine and serves the purpose and that is all that matters!
FWIW, don't sweat the filter too much. My brother (bless his heart) let the OE Fuel Filter on his 01 Jetta go for just over 171,000 miles (scouts honor, that is the truth)... with no issues at all. That engine, as stated about, is in the 03 with over 300k miles on it.