i know its not the cheapest option but buying another air compressor with high cfm low capacity and adding that to the aux tank in combonation with your existing air compressor is probably your best bet at a more efficent compressor system its still cheaper than buying a 10 cfm tank

I finally got tired of my air compressor 26 gallon craftsman it works fine but it’s recovery time is painfully slow I’m no expert but it gets annoying constantly waiting I finally bought bought the Bauer Impact 20v harbor freight is having great deal 5amp battery plus charger $89 bucks plus you get 1 free tool

I recently sold my 30Gal compressor thinking it was too big to be portable and too small to run big tools and I bought a 6gal compressor. I bought the small one because it only takes a fraction of the time to fill up. After using the air wand to blow dust around I immediately regretted selling the one with the big tank. Years ago I had a small 5 or 6 gallon air tank that I hardly used so when we moved I didn't keep it. Live and learn right?! Geez. SO now I am wanting to add a second tank for when I need to blow dust and crap but I am also concerned about having the smaller motor and it having a much shorter life. I mean doubling the tank size is using the compressor twice as much and halfling the usage life. Or do I just say screw it and let it run with what I have and when it dies just buy a bigger one like I should have kept... Thats the cheaper option.