I always feel better at the end of the day when I have the air filter operating. cutting and grinding (plus concrete dust from walking) puts stuff in the air and this helps to clear it.
Steve Melton
N531EM, RV9A, Superior O-320, WW 200RV prop, Slick mags, CHT 330F, EGT 1300F, B&C, 1300+ hours
Freedom and Democracy are all that really matter.
Ride a bike, unlock the world. https://www.rvplasticparts.com/ https://www.gpsdock1.com/