On second look you're right. Chicago really has this model burried. It's not listed under Badger Airbrushes - but neither is the Krome. You can find it with "search." And even at Chicago discounted prices the 20/20 Sotar (a double action) weighs in at $270. I emailed Chicago about the Badger 200 (all out of stock) and they replied that whenever Badger had the itch, they'd send Chicago a new shipment of 200s, they'd sell out fast, and wait again until later. They did not suggest ordering the brush (even though it was $20 less than on Amazon) and waiting until stock was replenished. So perhaps Chicago is not the place to go for things Badger. Live and learn. But they've been great to deal with in the past, their prices are low, and I will continue to do business with them.
Below though you can see why I was confused after the first brush sent went kaput when I did as Brayson said and detached the chuck from the adjustment screw. The other reviews were of 200-20 and none recommended removal of needle alone through the rear.
Chicago airbrush puts the 200-20 with the 200 series.
http://www.chicagoairbrushsupply.com/bamo200nh1.html
A YouTube from Commando Designs that appears to have some link with Chicago (this video appears also on the Chicago web page) does also: check time 2:30 for needle removal.
https://www.youtube.com/watch?v=y-RgaolrmQo
Another review by Billy Carr shows needle removal 1:05. The brush looks the same as the one in Commando or as pictured in Chicago: the handle is a different color and has three bands around it.
https://www.youtube.com/watch?v=naQnxvn3f0A
In any case, I'm not going to mess with the chuck screw which is very tightly on and will pull the needle and screws out together. We'll see if this brush needs less cleaning than I'd give a double action.
Eric