For long days like an airshow, weight distribution is key. Packing your heavier items (lens, camera body) closer to your back and keeping frequently...
I had registered for a couple of webinars yesterday, but due to our schedule picking up and taking care of a couple of grandkids was unable to catch...
I just put on the Challenger filter and no longer need these 3 Oil filters or the Airwolf AFC-470 Oil Can Cutter. Obviously the filters are brand new...