You cannot set the newer style needles like the dvd with Grose jets. You have to hang them upside down from your picture above, actually right side up.
I fooled with mine for many months before I realized this. A lot of other guys have run into it too. The newer needle jets are so sensitive they won't hold the weight of the floats like the dvd shows.
First off I would straighten the float tabs back into shape. Disregard the red circle. The tangs should look like an upside down slice of cantaloupe not like a ramp.
Then hold them right side up and blow through fuel bung while pushing the float upwards. Have something that is .55" wide and hold it against the bottom of the lid. When you are at .55" you should not be able blow any air. Valve is closed. That worked for me. I got bored last winter and did this to make sure they were right.
The 10mm down seems to be the easiest and most frequently used way now. I've never done it but here's @jonathanrussell method, sounds simple huh?
Regarding adjusting floats....personally I think it is the most important and tedious step in getting the carbs working right. Bending the little tabs one way and then the other in an effort to get the float set just right is insanely frustrating but worth the effort. My personal preference for setting the floats is to remove the bowls, turn down the mixture screws 10 turns, and set the fuel level so that the convex meniscus fuel bubble sits perfectly even with the top of the nozzle. Once you get this accomplished, in my experience, you are able to freely adjust the mixture down to 2.5 turns and then detail adjust using Color Tune or similar. This technique has been documented multiple times on this site and others, fyi.