Is QC3 enough?

I recently bought the Devilbiss QC3 desiccant dryer/filer and am in the final stages of setting up my air system. But there are so many variations online regarding how to set up your system.

What I'm curious about is do I still need an additional filter or dryer of some type in the system? Or is the QC3 enough? My system will be simple to start. I'd like to just do one drop containing any and all filters/dryers needed.

So, my plan was to run the line from the air compressor for about 50 feet to allow for cooling. Then I would have my supply drop containing the QC3 (and any other one i may need) which will ultimately feed my hose reel.

After the supply drop, the hard lines will continue to one final system drop for a drain. But as you can see, I'd like to keep the system simple and have only one drop.

I plan on painting my car myself and will run all of the necessary autobody tools.

I'm just confused if I need another dryer or filer along with the QC3.

Thanks for any input.

Mike