You may just have a main nozzle drop out of place. I've torn a few apart that the plug fell out and the nozzle was about to. Someone before didn't tighten them.
I'd save removing any steel balls as a last resort. Good chance of ruining a carb. that may not need them removed. After soaking in carb. cleaner overnight after I wash that off and blow them dry I put them in the solvent tank and direct the nozzle into each passage and observe for flow out the proper holes. If they flow then there open. No major sugery required.