I was trying to figure how many oil changes I've done and on which sizes of engines. It's good getting old because it all seems like a blur now and the aggravation has melted away with memory cells. Let's just say it's better than 5,000.
What I would typically do with a diesel engine of that size is position an adequately sized drain pan, pull the drain plug and fish it out with a stick magnet. This allows me to inspect the drain oil (at least sediment in the drain pan) and clean the plug (better drain plugs have a magnet). If I had to install a valve every time and muck about with hoses, I'd devise a simpler method (but that's me). I don't think there's any big issues with just using a valve like that and developing a large amount of sludge or sediment on the crankcase bottom. You could check every 50K miles or so and inspect for build up. Today's engine oils are engineered to suspend solids and nearly all will be borne away with draining.
I'd suggest to buy a filter socket in the size of the oil filter you're using. It makes life easier than a strap wrench. Filling the filter to maximum isn't required, either. It's easier to install the filter with half a filter full than filled to the top. Remember to oil the seal, of course.
If the newer Cummins are anything like their older siblings, you have a fine engine there. Good to see you are treating it right.
