Please use tap water for more than 4 hours, please use large basins and more water!
Please use 7.5 inner tube
Heavy weight: Please re-adjust your upper spin, try to ensure that the initial speed is above 70, because the egg is harder, the initial speed is too low and the effect is not good.
No matter what spin up you use, please use good quailty water as much as possible! Water is a very important reason for bad ballistics!