Thought I would chime in with a photo of my rig.
I had tested out a friends set of Blunt low dollar stock wheels (about 2000gr) and his Neo moto Pancenti tires.
He didn't have them set up tubeless either.
I added some heavy old back up skewers, some older heavy rotors and my XX cassette.
I went to a popular local 25 mile loop twice, I ride regularly and raced on a bunch and then tested it out on a smaller fast 6 mile loop and a longer local 20 mile trail. I was sold. The wheels allow the bike to handle chatter bumps way faster, smoother, the bike is more stable at higher speeds on the trail, it handles roots, rocks and obstacles way better. I spend less time thinking about my lines and more time focusing
on how much faster I can push the bike. It raised up my BB and cranks now, so I can pedal through more turns and over more roots. I was up one gear higher on the cassette, while riding my popular trails. The bike was still light and quick enough to whip around and flick down sweeping trail sections with trees. I was quicker to get going from a stand still and quicker up short steep uphill sections than my fast friends on 29er bikes - HT and Full Susp. I was able to lean the bike, even with the tubed tires, further over than I have ever had it and pushed the bike into turns and sections of the 25 mile trail, where I had never before. Confidence!
Hence the newly built race Stans 650b rims with the sweet race light DT240 disc hubs.
The wheels weighed in around 1500 grams, the tires are Neo Motos with paint pen covering the logos, since my team is sponsored by
another tire manufacture. These neo's are right about 500 grams give or take 10g. I would like to try the Schwalbe Racing Ralph 650B Tires though, as they seem to be just a little more narrow.
I have them set up tubeless with Stans and stans tape.
The bike is about 22 1/2 lbs