Absolutely no reason why locktight should be on the choke valve screws (choke plate as you call it). These are small screws and when installing them they are down at an angle and can easily be cross threaded. Someone took a shortcut after stripping the threads and used lock-tite. They thought it would be a permanent fix. "Something to look for?" Means, do not use whoever rebuilt that Carb... Please post this rebuilder...I wouldn't use these idiots.