you have my # stick boom is adjustable its on the top of stick boom square block with a screw. that controls how fast it drops. if the controls leak even a little buy the orings and rebuild its easy. on the stick and bucket rotate how far back are you pulling the joy stick mount?? more than straight across it will act as you describe. if that dose not cure it rebuild joy sticks its cheap if still not right start pulling shuttle valves. shuttle o rings are about the only thing that bothers on these.