Shortcuts are long cuts when it comes to carburetors. Best do it right ONE time. I rebuild a lot of carbs and, no disrespect, see red flags all over your post here.
Completely agree. Break them down is the only way, a few days more upfront will result in many years of correctness. Get some brake clean, spray every passage. Find out, if you spray in this port where does the fluid exit, then spray again but plug the found exit, more then likely it will exit somewhere else. Continue this till you have completely stopped the spray. Do this frontwards and backwards. You will be amazed at how many ports are connected. Then take a second body and spray that one, taking notice to compare the volume and sound of a similar passages from your first carb, to the second. This will ensure you have clean clear passage ways. Meticulously inspect the brass Jets and make sure they are 100% clean. Check the jet needles for ware and straightness, and make sure they are all on the same clip notch. Inspect your main Jets for correct size, I have seen lots of numbered Jets drilled out. Check the floats, bend as necessary to get them all straight and consistent. Mock up the floats and pins and bowls, making sure the floats are not hanging up on or rubbing on the bowl sides. Check the float pins and floats for bind and smooth free pivoting. Clean and polish the float needles and seat. Have the choke plunger seals replaced. Replace all O-Rings and gaskets. Once they are reassembled, set a steel ruler across the bottom of the bowls and make sure every float is hanging down the same distance, bend the brass arms to correct. Bench sync. Set float levels. Set pilot screws to factory settings. There are no shortcuts when doing complete, competent, quality work.