I just did redid 2 carbs. I work on mostly cars though.
I bought a Bottom-of-the-Harbor-Freight ultrasonic cleaner. Did a great job cleaning the carbs with little effort. I disassembled, put the parts in, then went back to work doing other stuff while the machine did the work. I should have bought one years ago. I think I aid about $45-50 after the discount coupon. I am sure other brands would work as well or better.
I rough sprayed the carb with cleaner. Then put in the ultrasonic. Then sprayed out all the hole with carb cleaner and compressed air. Then back in the ultrasonic cleaner again. Lather rinse repeat twice. Came out awesome.
It works great for other small item too.