Just a data point. I got an ultrasonic cleaner, I think it's a 2 liter one, at Harbor Freight. It has a heater
and a timer. 25% simple green, 75% water cleans a carb that's been sitting forever like it's new. I've been
keeping my eyes open for one at HGR that will fit cases and such but so far nothing cheap enough for my taste.
The one at H.F. was about $60 if I recall correctly. 100 uses, I've had mine 5-6 years and works great
still. Don't even have to take the jets out.