For those of you with air bag suspension, and a myriad of solenoid valves clicking and wheezing away, I offer you this:
Commercially available 5 micron air filters that will hand your air flow and pressures, and give you the option of automatic bowl draining.
I used to use Festo in my work and an industrial machine designer and builder, and their equipment operated flawlessly for millions of cycles in my industrial automation.
https://www.festo.com/cat/en-gb_gb/data/doc_ENUS/PDF/US/MS12-LFM-NPT_ENUS.PDF
A good idea for the electric auxiliary compressor. Looks better than OE.
The main engine-driven compressor already has an air filter and air dryer.