64 Slant carburetor problems

My rebuilt Carter carburetor is now 7years old, and acting up. I believe it needs a rebuild. I purchased my current rebuilt carburetor from Champion Carburetors which had to be repaired because a gasket was installed upside down during their rebuild process. Therefore, I am probably going to avoid buying a rebuild from them again. Also, they only carry the Holley as of this date. I have rebuilt 1 barrel carburetors from my ford 200 engines back in the 1990's with great results. But, it has been a long time. I see that the carburetorshop.com has rebuild kits, and of course, daytonaparts.com, has rebuild kits for my carter. I am debating on trying to rebuild myself or buying an entire replacement carburetor. Which would be the best long term solution, based on your experiences?