Ron, really nice photo.
David Sodamo, good to see the kids getting along.....I wish mine would be that good.
Yesterday, I got the daughter on the 4310 tractor mowing, then I was going to get on the bigger machine. It had a front flat.

Just a slow leak, but I had to use a portable air can and make 2 trips to get it full enough. Then, I fired it up and remembered I parked it low on fuel...I went and got 21.6 gallons of diesel at $1.80/gallon (crammed into 4 jugs.) Got home and filled up tractor. It took all but the last 1.5 gallons. Daughter had already finished about 2.5 acres, and had put up the small tractor. It was hot, so I decided I MIGHT mow later. Well evening came and I got distracted watching last week's flat track race... It got dark at 7: 40ish, and it was still hot.
Woke up pre-dawn, thought about firing up the tractor to mow.....Then thought twice about it, not to awake a sleeping wifey. At 7:30am, I finally got out there and got after it. My goal was to mow down all the high johnson grass (that I need to treat). It took 2.5 hours, but I got most all of it. Also while I was dirty, I got on the rider for a few minutes to hit an area behind the barn the daughter missed.
Then got cleaned up to go to church.
New outside cat is doing alright, post spaying surgery. We let her roam the barn with the doors open during the day. She is friendly to people, but runs the chickens out of the barn (good thing), and she has the full grown neighbor cats afraid of her. She is a tough cookie. Maybe that's how she survived, living in the woods.
RNG, yes, the HEPA will work. Any air cleaner will help. Put something over your HVAC blower's filter to help, but not block too much. A thin sheet maybe?
Hope all of youz have a blessed day.