Yep if fuel isn't constantly running out of the drain hose or filling your catch can then it's probably nothing to worry about.
However, if you want to have it be the best it can be i would suggest looking at the float settings and also the float needle and the brass seat.
Occasionally, i see floats that have absorbed fuel and actually don't float as well as they should.
When we do an engine refresh it includes going through the carb and part of that process means we weigh the float. If it weighs more than 8 grams on our scale it gets replaced and the seat always gets polished to remove any foreign material.
Off the subject, i always get concerned when i see a kart with massive amounts of lead on it. I would caution you to double check that all those weights are fastened safely. Just because the tech officials don't or the scale person doesn't say anything doesn't mean everything is good to go.
To me a thin fiberglass or plastic seat with even 1 lead weight mounted to it needs to be closely monitored. A 5 pound lead weight traveling at 10 to 70 MPH is a lethal projectile. A seat with 50 or more pounds of lead on it is something scares the heck out of me.