First. the Bing 15mm clone has some poor machining and needs small corrections done to it. Remove the carb and strip it down then run the top of the carb over a wet stone till it nice and smooth then clean the hell out of it.
Second. The clone carb top is thinner than the OEM so the clone top will bow a small amount when it’s tightened up so if you have a OEM top use it.
Third. Both the OEM and the clone top gaskets are really thin so buy them in two’s and double stack them for a leak free carb.
I also started making my own intake gaskets since the Treats gaskets are thin and junk.