Plus,...the engine will flood real easy just sitting,you need to clamp of the line to the carb or leave the fuel system open,..until your ready to fly.
Something wrong there I think?
The diaphragm in the regulator should not allow fuel past, until there is suction from the carb,i.e. the engine should be running,or at least turning over on the starter.
I don't fly it very often nowadays, but I have a Cline regulator (very close to the carb) on an OS 120 Ax,and it has always performed well for me.
Because the model hangs about (literally) unflown for months at a time, starting up for the first time involves a fairly generous prime from a sqeezy bottle, but after that starting and running are very consistent.